Merge branch 'fneill-master-patch-04646' into 'master'

Add heading for billable users

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/160081



Merged-by: Marcin Sedlak-Jakubowski <msedlakjakubowski@gitlab.com>
Approved-by: Marcin Sedlak-Jakubowski <msedlakjakubowski@gitlab.com>
Co-authored-by: Fiona Neill <fneill@gitlab.com>