Merge branch '373087-monitor-visibility-improve-help_text' into 'master'

Improve help-text for Monitor visibility setting

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/105532



Merged-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Approved-by: Amelia Bauerly <abauerly@gitlab.com>
Approved-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Co-authored-by: Laurent Deketelaere <laurent@geturl.net>