Add front matter and fixes to some topics

doc/administration/gitaly/praefect.md

@@ -137,7 +137,7 @@ We will note in the instructions below where these secrets are required.
 ### PostgreSQL
 
 NOTE: **Note:**
-do not store the GitLab application database and the Praefect
+Do not store the GitLab application database and the Praefect
 database on the same PostgreSQL server if using
 [Geo](../geo/replication/index.md). The replication state is internal to each instance
 of GitLab and should not be replicated.

doc/development/gitaly.md

-# GitLab Developers Guide to Working with Gitaly
+---
+stage: Create
+group: Gitaly
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+type: reference
+---
+
+# Gitaly developers guide
 
-[Gitaly](https://gitlab.com/gitlab-org/gitaly) is a high-level Git RPC service used by GitLab CE/EE,
-Workhorse and GitLab-Shell.
+[Gitaly](https://gitlab.com/gitlab-org/gitaly) is a high-level Git RPC service used by GitLab Rails,
+Workhorse and GitLab Shell.
 
 ## Deep Dive
 

doc/install/aws/index.md

@@ -546,7 +546,8 @@ gitlab=# \q
 #### Set up Gitaly
 
 CAUTION: **Caution:**
-In this architecture, having a single Gitaly server creates a single point of failure. This limitation will be removed once [Gitaly Cluster](https://gitlab.com/groups/gitlab-org/-/epics/1489) is released.
+In this architecture, having a single Gitaly server creates a single point of failure. Use
+[Gitaly Cluster](../../administration/gitaly/praefect.md) to remove this limitation.
 
 Gitaly is a service that provides high-level RPC access to Git repositories.
 It should be enabled and configured on a separate EC2 instance in one of the

doc/user/application_security/configuration/index.md

@@ -21,7 +21,7 @@ state of each feature. If a job with the expected security report artifact exist
 the feature is considered configured.
 
 NOTE: **Note:**
-if the latest pipeline used [Auto DevOps](../../../topics/autodevops/index.md),
+If the latest pipeline used [Auto DevOps](../../../topics/autodevops/index.md),
 all security features will be configured by default.
 
 ## Limitations