Merge branch 'tchu-bump-version-for-patch1' into 'release-4.3.8'

Release version 4.3.8-patch1

See merge request https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer/-/merge_requests/258



Merged-by: Dmitry Gruzd <dgruzd@gitlab.com>
Approved-by: Dmitry Gruzd <dgruzd@gitlab.com>
Co-authored-by: Terri Chu <tchu@gitlab.com>