Merge branch 'mg-clarify-paths-inputs-20240926' into 'master'

Clarify possible inputs for `rules:changes:paths`

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167315



Merged-by: Lysanne Pinto <lpinto@gitlab.com>
Approved-by: Lysanne Pinto <lpinto@gitlab.com>
Co-authored-by: Manuel Grabowski <mgrabowski@gitlab.com>