Merge branch 'docs-auto-devops-trouble' into 'master'

Move Auto DevOps troubleshooting to new file

See merge request gitlab-org/gitlab!54694

doc/topics/autodevops/upgrading_postgresql.md

@@ -34,7 +34,7 @@ involves:
    so that the in-cluster database does not get modified after the database dump is created.
 1. Ensure you have not set `POSTGRES_ENABLED` to `false`, as this setting deletes
    any existing channel 1 database. For more information, see
-   [Detected an existing PostgreSQL database](index.md#detected-an-existing-postgresql-database).
+   [Detected an existing PostgreSQL database](troubleshooting.md#detected-an-existing-postgresql-database).
 
 NOTE:
 If you have configured Auto DevOps to have staging,