No more update on stable/12

[Tj]

So the suggestion is still to use official freebsd.org url where possible?

> Belatedly, this has now happened. Before the stable and master branches on GH were the legacy kind that we need to get rid of. As of yesterday, the main and stable branches on GH now match what is on git.freebsd.org for both doc and src. Please see the update on the legacy `master` branch on GH if you want to keep using this 3rd party clone/mirror instead of using the official FreeBSD one. Cheers Uli