Merge branch 'docs-klang-replication-troubleshooting-formatting-improvements' into 'master'

Refactor sync troubleshooting sections

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/170827



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Michael Kozono <mkozono@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: keelanlang <klang@gitlab.com>