"Changes" tab doesn't work in Safari

Summary

"Changes" tab doesn't work in Safari under macOS Big Sur after latest GitLab EE update (13.12)

Steps to reproduce

Open random Merge Request and go to "Changes" tab.

Relevant logs and/or screenshots

Fix

Upgrade to 13.12.3 (or later) for !62961 (merged) "Set CSP back to disabled by default" https://about.gitlab.com/releases/2021/06/07/gitlab-13-12-3-released/