ci: Run package_hunter on MRs that updates yarn.lock
What does this MR do?
This runs package_hunter
on MRs that updates yarn.lock
as suggested in https://gitlab.com/gitlab-com/gl-security/security-research/package-hunter/-/issues/20#note_543370758.
Related to https://gitlab.com/gitlab-org/gitlab/-/issues/323277.
Edited by Rémy Coutable