Hey, I'm the GitHub employee who's working on fixing that right now. The service powering those stats is _ancient_, and it fell over back in September. It's taken longer than I hoped to get a replacement working, but it should be fixed within the next couple of weeks, fingers crossed.
Speaking of "temporarily unavailable but it's actually forever", I've been wanting to get into Fallout and Starfield modding, so been waiting for their official wiki to come out of maintenance mode. I think I first tried to access it when Starfield launched (September 2023), and still today it is "currently down for backend maintenance". https://wiki.bethesda.net/
“ Referring sites and popular content are temporarily unavailable or may not display accurately. We're actively working to resolve the issue.”
It’s been like that for months now with no sign of anyone working on it. They just don’t care about user experience anymore.
https://github.com/orgs/community/discussions/173494