Exclude comments from specific docs

doc/update/9.1-to-9.2.md

+---
+comments: false
+---
+
 # From 9.1 to 9.2
 Make sure you view this update guide from the tag (version) of GitLab you would

doc/update/9.2-to-9.3.md

+---
+comments: false
+---
+
 # From 9.2 to 9.3
 Make sure you view this update guide from the tag (version) of GitLab you would

doc/update/9.3-to-9.4.md

+---
+comments: false
+---
+
 # From 9.3 to 9.4
 Make sure you view this update guide from the tag (version) of GitLab you would

doc/update/9.4-to-9.5.md

+---
+comments: false
+---
+
 # From 9.4 to 9.5
 Make sure you view this update guide from the tag (version) of GitLab you would

doc/update/9.5-to-10.0.md

+---
+comments: false
+---
+
 # From 9.5 to 10.0
 Make sure you view this update guide from the tag (version) of GitLab you would

doc/update/patch_versions.md

+---
+comments: false
+---
+
 # Universal update guide for patch versions
 ## Select Version to Install

doc/update/upgrader.md

+---
+comments: false
+---
+
 # GitLab Upgrader (deprecated)
 *DEPRECATED* We recommend to [switch to the Omnibus package and repository server](https://about.gitlab.com/update/) instead of using this script.

doc/workflow/README.md

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+comments: false
+---
+
 # Workflow
 - [Automatic issue closing](../user/project/issues/automatic_issue_closing.md)

doc/workflow/gitlab_flow.md

 ![GitLab Flow](gitlab_flow.png)
-## Introduction
+# Introduction to GitLab Flow
 Version management with git makes branching and merging much easier than older versioning systems such as SVN.
 This allows a wide variety of branching strategies and workflows.