Merge branch 'tnir-pg-14-on-docs' into 'master'

docs: Replace deprecated PostgreSQL versions with 14 in GitLab CI

See merge request gitlab-org/gitlab!88139

doc/ci/docker/using_docker_images.md

@@ -112,7 +112,7 @@ For example, the following two definitions are equal:
   image: "registry.example.com/my/image:latest"
   services:
-    - postgresql:9.4
+    - postgresql:14.3
     - redis:latest
   ```
@@ -124,7 +124,7 @@ For example, the following two definitions are equal:
     name: "registry.example.com/my/image:latest"
   services:
-    - name: postgresql:9.4
+    - name: postgresql:14.3
     - name: redis:latest
   ```

doc/ci/services/index.md

@@ -201,7 +201,7 @@ end-to-end-tests:
       alias: firefox
     - name: registry.gitlab.com/organization/private-api:latest
       alias: backend-api
-    - postgres:9.6.19
+    - postgres:14.3
   variables:
     FF_NETWORK_PER_BUILD: 1
     POSTGRES_PASSWORD: supersecretpassword

doc/ci/services/postgres.md

@@ -46,7 +46,7 @@ If you're wondering why we used `postgres` for the `Host`, read more at
 [How services are linked to the job](../services/index.md#how-services-are-linked-to-the-job).
 You can also use any other Docker image available on [Docker Hub](https://hub.docker.com/_/postgres).
-For example, to use PostgreSQL 9.3, the service becomes `postgres:9.3`.
+For example, to use PostgreSQL 14.3, the service becomes `postgres:14.3`.
 The `postgres` image can accept some environment variables. For more details,
 see the documentation on [Docker Hub](https://hub.docker.com/_/postgres).