Merge branch 'docs/add-azure-geo-promotion-step' into 'master'

Docs - add Azure Geo promotion step

See merge request gitlab-org/gitlab!32056

doc/administration/geo/disaster_recovery/index.md

@@ -172,11 +172,12 @@ do this manually.
 The `gitlab-ctl promote-to-primary-node` command cannot be used in conjunction with
 an external PostgreSQL database, as it can only perform changes on a **secondary**
 node with GitLab and the database on the same machine. As a result, a manual process is
-required. For example, PostgreSQL databases hosted on Amazon RDS:
+required:
 
 1. Promote the replica database associated with the **secondary** site. This will
    set the database to read-write:
    - Amazon RDS - [Promoting a Read Replica to Be a Standalone DB Instance](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html#USER_ReadRepl.Promote)
+   - Azure Database for PostgreSQL - [Stop replication](https://docs.microsoft.com/en-us/azure/postgresql/howto-read-replicas-portal#stop-replication)
 
 1. Edit `/etc/gitlab/gitlab.rb` on every node in the **secondary** site to
    reflect its new status as **primary** by removing any lines that enabled the