Mentions in private repos show up in public places
Hi, in a commit in my private repo, I referenced this issue: #17769 (closed) the fact that I referenced it, now shows up on that issue page.
Steps to reproduce
Mention a normal issue in a commit in a private repo. The mention now shows on the public issue page.
I would expect it not to be seen anywhere, since my repo is private, and the name is mentioned in the public page. So now people can discover that a private repo with that name exists.