Merge branch 'ig-fix-endpoint-to-create-comment-on-multiple-lines' into 'master'

Fix param type for new_line and old_line

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182325



Merged-by: Stan Hu <stanhu@gmail.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Co-authored-by: ivanelrey <ivanejg@yahoo.com>