Merge branch 'alipniagov/update-workhorse-to-8-51' into 'master'

Update Workhorse version to 8.51.0

See merge request gitlab-org/gitlab!45256

GITLAB_WORKHORSE_VERSION

-8.50.0
+8.51.0

changelogs/unreleased/alipniagov-update-workhorse-to-8-51.yml

+---
+title: Update GitLab Workhorse to v8.51.0
+merge_request: 45256
+author:
+type: other