Upgrade to GitLab 13.7.4

No problems automatically updating the monolithic Docker image and run the container by Watchtower.
GitLab Critical Security Release: 13.7.4, 13.6.5 and 13.5.7
GitLab Patch Release: 13.7.3
GitLab Security Release: 13.7.2, 13.6.4, and 13.5.6