GITLAB_WORKHORSE_VERSION refers to non-existent tag 8.3.3 in v11.8.6

Summary

Updating to v11.8.6, GITLAB_WORKHORSE_VERSION refers to a tag 8.3.3 that doesn't exist in https://gitlab.com/gitlab-org/gitlab-workhorse, the last one is 8.3.1.

Steps to reproduce

Follow update from source instructions for v11.8.6.

What is the current bug behavior?

$ pwd
/srv/git/gitlab
$ git describe
v11.8.6
$ cat GITLAB_WORKHORSE_VERSION
8.3.3
$ cd ../gitlab-workhorse
$ sudo -u git -H git fetch --all --tags --prune
Fetching origin
$ sudo -u git -H git checkout v$(</srv/git/gitlab/GITLAB_WORKHORSE_VERSION)
error: pathspec 'v8.3.3' did not match any file(s) known to git

https://gitlab.com/gitlab-org/gitlab-workhorse/tags/v8.3.3 -> 404

What is the expected correct behavior?

$ pwd
/srv/git/gitlab
$ git describe
v11.8.6
$ cat GITLAB_WORKHORSE_VERSION
8.3.3
$ cd ../gitlab-workhorse
$ sudo -u git -H git fetch --all --tags --prune
Fetching origin
$ sudo -u git -H git checkout v$(</srv/git/gitlab/GITLAB_WORKHORSE_VERSION)
HEAD is now at XXX Merge branch 'make-8-3-3' into '8-3-stable'

https://gitlab.com/gitlab-org/gitlab-workhorse/tags/v8.3.3 -> 200