Bad link or something? Claims there's currently no text on that page.
Especially considering that since MicroSoft bought GitHub, there have been projects underway to enable self-hosted code forges to interoperate with each other. Replacing the 'everyone's there' network effects of GH;
https://wiki.p2pfoundation.net/List_of_Community-Hosted_Code_Forge_Instances/
GH has been getting increasingly awful since MS bought it, and the only thing that gives it any value or usefulness to MS is the fact people keep using it.
Discussion
Well caught. Just fixed the link. Odd though, I've never seen a trailing slash cause a URL to fail like that before.