Merge branch '428638-vue3-migration-enumerated-coercion-3' into 'master'

Fix ATTR_ENUMERATED_COERCION for contenteditable

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138493



Merged-by: Jose Ivan Vargas <jvargas@gitlab.com>
Approved-by: Eduardo Bonet <ebonet@gitlab.com>
Approved-by: Jose Ivan Vargas <jvargas@gitlab.com>
Co-authored-by: Artur Fedorov <afedorov@gitlab.com>