Merge branch 'docs-uc-fix-usage-of-since-pt3' into 'master'

Docs: style update - replace `since` with `because` (part 3)

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183103



Merged-by: Lorena Ciutacu <lciutacu@gitlab.com>
Approved-by: Lorena Ciutacu <lciutacu@gitlab.com>
Reviewed-by: Lorena Ciutacu <lciutacu@gitlab.com>
Co-authored-by: Uma Chandran <uchandran@gitlab.com>