Merge branch 'aqualls-clean-up-heading-links' into 'master'

Cleans up subheadings with embedded links

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/161088



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Amy Qualls <aqualls@gitlab.com>