Merge branch '38072-discourage-editing-of-todo-files' into 'master'

Add discouragement of adding new lines in rubocop todo files

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141708



Merged-by: Kerri Miller <kerrizor@kerrizor.com>
Approved-by: Peter Leitzen <pleitzen@gitlab.com>
Approved-by: Kerri Miller <kerrizor@kerrizor.com>
Reviewed-by: Peter Leitzen <pleitzen@gitlab.com>
Reviewed-by: Doug Stull <dstull@gitlab.com>
Co-authored-by: Doug Stull <dstull@gitlab.com>
Co-authored-by: Peter Leitzen <pleitzen@gitlab.com>