Fix typo in docs about Elasticsearch

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

changelogs/unreleased/small-s-in-elasticsearch.yml

+---
+title: Fix typo in docs about Elasticsearch
+merge_request: 30162
+author: Takuya Noguchi
+type: other

doc/administration/gitaly/index.md

@@ -48,7 +48,7 @@ used by Omnibus and the GitLab source installation guide.
 Starting with GitLab 11.4, Gitaly is able to serve all Git requests without
 needed a shared NFS mount for Git repository data.
 Between 11.4 and 11.8 the exception was the
-[Elastic Search indexer](https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer).
+[Elasticsearch indexer](https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer).
 But since 11.8 the indexer uses Gitaly for data access as well. NFS can still
 be leveraged for redudancy on block level of the Git data. But only has to
 be mounted on the Gitaly server.

doc/development/architecture.md

@@ -93,8 +93,8 @@ graph TB
   Prometheus --> Alertmanager
   Migrations --> PostgreSQL
   Runner -- TCP 443 --> NGINX
-  Unicorn -- TCP 9200 --> ElasticSearch
-  Sidekiq -- TCP 9200 --> ElasticSearch
+  Unicorn -- TCP 9200 --> Elasticsearch
+  Sidekiq -- TCP 9200 --> Elasticsearch
   Sidekiq -- TCP 80, 443 --> Sentry
   Unicorn -- TCP 80, 443 --> Sentry
   Sidekiq -- UDP 6831 --> Jaeger
@@ -158,7 +158,7 @@ Component statuses are linked to configuration documentation for each component.
 | [LDAP Authentication](#ldap-authentication) | Authenticate users against centralized LDAP directory | [⤓][ldap-omnibus] | [⤓][ldap-charts] | [⤓][ldap-charts] | [❌](https://about.gitlab.com/pricing/#gitlab-com) | [⤓][gitlab-yml] | [⤓][ldap-gdk] | CE & EE |
 | [Outbound email (SMTP)](#outbound-email) | Send email messages to users | [⤓][outbound-email-omnibus] | [⤓][outbound-email-charts] | [⤓][outbound-email-charts] | [✅](../user/gitlab_com/index.md#mail-configuration) | [⤓][gitlab-yml] | [⤓][gitlab-yml] | CE & EE |
 | [Inbound email (SMTP)](#inbound-email) | Receive messages to update issues | [⤓][inbound-email-omnibus] | [⤓][inbound-email-charts] | [⤓][inbound-email-charts] | [✅](../user/gitlab_com/index.md#mail-configuration) | [⤓][gitlab-yml] | [⤓][gitlab-yml] |  CE & EE |
-| [ElasticSearch](#elasticsearch) | Improved search within GitLab | [⤓][elasticsearch-omnibus] | [⤓][elasticsearch-charts] | [⤓][elasticsearch-charts] | [❌](https://gitlab.com/groups/gitlab-org/-/epics/153) | [⤓][elasticsearch-source] | [⤓][elasticsearch-gdk] | EE Only |
+| [Elasticsearch](#elasticsearch) | Improved search within GitLab | [⤓][elasticsearch-omnibus] | [⤓][elasticsearch-charts] | [⤓][elasticsearch-charts] | [❌](https://gitlab.com/groups/gitlab-org/-/epics/153) | [⤓][elasticsearch-source] | [⤓][elasticsearch-gdk] | EE Only |
 | [Sentry integration](#sentry) | Error tracking for deployed apps | [⤓][sentry-integration] | [⤓][sentry-integration] | [⤓][sentry-integration] | [⤓][sentry-integration] | [⤓][sentry-integration] | [⤓][sentry-integration] | CE & EE |
 | [Jaeger integration](#jaeger) | Distributed tracing for deployed apps | [⤓][jaeger-integration] | [⤓][jaeger-integration] | [⤓][jaeger-integration] | [⤓][jaeger-integration] | [⤓][jaeger-integration] | [⤓][jaeger-integration] | EE Only |
 | [GitLab Managed Apps](#gitlab-managed-apps) | Deploy [Helm](https://docs.helm.sh/), [Ingress](https://kubernetes.io/docs/concepts/services-networking/ingress/), [Cert-Manager](https://docs.cert-manager.io/en/latest/), [Prometheus](https://prometheus.io/docs/introduction/overview/), a [Runner](https://docs.gitlab.com/runner/), [JupyterHub](http://jupyter.org/), [Knative](https://cloud.google.com/knative) to a cluster | [⤓][managed-k8s-apps] | [⤓][managed-k8s-apps] | [⤓][managed-k8s-apps] | [⤓][managed-k8s-apps] | [⤓][managed-k8s-apps] | [⤓][managed-k8s-apps] | CE & EE |

doc/development/elasticsearch.md

@@ -2,14 +2,14 @@
 This area is to maintain a compendium of useful information when working with elasticsearch.
-Information on how to enable ElasticSearch and perform the initial indexing is kept in ../integration/elasticsearch.md#enabling-elasticsearch
+Information on how to enable Elasticsearch and perform the initial indexing is kept in ../integration/elasticsearch.md#enabling-elasticsearch
 ## Deep Dive
-In June 2019, Mario de la Ossa hosted a [Deep Dive] on GitLab's [ElasticSearch integration] to share his domain specific knowledge with anyone who may work in this part of the code base in the future. You can find the [recording on YouTube], and the slides on [Google Slides] and in [PDF]. Everything covered in this deep dive was accurate as of GitLab 12.0, and while specific details may have changed since then, it should still serve as a good introduction.
+In June 2019, Mario de la Ossa hosted a [Deep Dive] on GitLab's [Elasticsearch integration] to share his domain specific knowledge with anyone who may work in this part of the code base in the future. You can find the [recording on YouTube], and the slides on [Google Slides] and in [PDF]. Everything covered in this deep dive was accurate as of GitLab 12.0, and while specific details may have changed since then, it should still serve as a good introduction.
 [Deep Dive]: https://gitlab.com/gitlab-org/create-stage/issues/1
-[ElasticSearch integration]: ../integration/elasticsearch.md
+[Elasticsearch integration]: ../integration/elasticsearch.md
 [recording on YouTube]: https://www.youtube.com/watch?v=vrvl-tN2EaA
 [Google Slides]: https://docs.google.com/presentation/d/1H-pCzI_LNrgrL5pJAIQgvLX8Ji0-jIKOg1QeJQzChug/edit
 [PDF]: https://gitlab.com/gitlab-org/create-stage/uploads/c5aa32b6b07476fa8b597004899ec538/Elasticsearch_Deep_Dive.pdf
@@ -57,7 +57,7 @@ Additionally, if you need large repos or multiple forks for testing, please cons
 ## How does it work?
-The ElasticSearch integration depends on an external indexer. We ship a [ruby indexer](https://gitlab.com/gitlab-org/gitlab-ee/blob/master/bin/elastic_repo_indexer) by default but are also working on an [indexer written in Go](https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer). The user must trigger the initial indexing via a rake task, but after this is done GitLab itself will trigger reindexing when required via `after_` callbacks on create, update, and destroy that are inherited from [/ee/app/models/concerns/elastic/application_search.rb](https://gitlab.com/gitlab-org/gitlab-ee/blob/master/ee/app/models/concerns/elastic/application_search.rb).
+The Elasticsearch integration depends on an external indexer. We ship a [ruby indexer](https://gitlab.com/gitlab-org/gitlab-ee/blob/master/bin/elastic_repo_indexer) by default but are also working on an [indexer written in Go](https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer). The user must trigger the initial indexing via a rake task, but after this is done GitLab itself will trigger reindexing when required via `after_` callbacks on create, update, and destroy that are inherited from [/ee/app/models/concerns/elastic/application_search.rb](https://gitlab.com/gitlab-org/gitlab-ee/blob/master/ee/app/models/concerns/elastic/application_search.rb).
 All indexing after the initial one is done via `ElasticIndexerWorker` (sidekiq jobs).
@@ -186,6 +186,6 @@ cluster.routing.allocation.disk.watermark.low: 15gb
 cluster.routing.allocation.disk.watermark.high: 10gb
 ```
-Restart ElasticSearch, and the `read_only_allow_delete` will clear on it's own.
+Restart Elasticsearch, and the `read_only_allow_delete` will clear on it's own.
 _from "Disk-based Shard Allocation | Elasticsearch Reference" [5.6](https://www.elastic.co/guide/en/elasticsearch/reference/5.6/disk-allocator.html#disk-allocator) and [6.x](https://www.elastic.co/guide/en/elasticsearch/reference/6.x/disk-allocator.html)_

doc/integration/elasticsearch.md

@@ -456,7 +456,7 @@ Here are some common pitfalls and how to overcome them:
     
     See [Elasticsearch Index Scopes](elasticsearch.md#elasticsearch-index-scopes) for more information on searching for specific types of data.
-- **I indexed all the repositories but then switched elastic search servers and now I can't find anything**
+- **I indexed all the repositories but then switched Elasticsearch servers and now I can't find anything**
     You will need to re-run all the rake tasks to re-index the database, repositories, and wikis.