Merge branch 'b_freitas-master-patch-f6a5' into 'master'

Add troubleshooting steps to the container registry documentation

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183808



Merged-by: Lysanne Pinto <lpinto@gitlab.com>
Approved-by: Lysanne Pinto <lpinto@gitlab.com>
Reviewed-by: Lysanne Pinto <lpinto@gitlab.com>
Co-authored-by: Bruno Freitas <bfreitas@gitlab.com>