open an issue for psql and prom in omnibus

tsa/howto/gitlab.md

@@ -458,7 +458,7 @@ The web frontend is Nginx (which we incidentally also use in our
 [GitLab Workhorse](https://gitlab.com/gitlab-org/gitlab-workhorse/) which in turn talks to the underlying GitLab
 Rails application, served by the [Unicorn](https://yhbt.net/unicorn/) application
 server. The Rails app stores its data in a [[postgresql]] database
-(although not our own deployment, for now: TODO). GitLab also offloads
+(although not our own deployment, for now, [should be fixed](https://gitlab.torproject.org/tpo/tpa/gitlab/-/issues/20)). GitLab also offloads
 long-term background tasks to a tool called [sidekiq](https://github.com/mperham/sidekiq).
 
 Those all server HTTP(S) requests but GitLab is of course also