Merge branch 'docs-debian-12' into 'master'

Add Debian 12 to supported OS

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/133140



Merged-by: Evan Read <eread@gitlab.com>
Approved-by: Evan Read <eread@gitlab.com>
Co-authored-by: DJ Mountney <dj@gitlab.com>