Merge branch 'eread/make-more-of-the-upgrade-notes-into-steps-to-follow' into 'master'

Make more of the upgrade notes into steps to follow

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/164135



Merged-by: Brendan Lynch <blynch@gitlab.com>
Approved-by: James Liu <jliu@gitlab.com>
Approved-by: Brendan Lynch <blynch@gitlab.com>
Reviewed-by: James Liu <jliu@gitlab.com>
Co-authored-by: Evan Read <eread@gitlab.com>