Not sure who to reach out to to fix this but most of the 'repository' buttons on the compiler team page return 404 on Github.
Here works! The problems and solutions were spread across multiple repos but I think I have a fix here. Not sure when it'll be live. Thank you for reporting!
We should remove docs part of the url from compiler-team repo see https://github.com/rust-lang/compiler-team/pull/103#issuecomment-515128273 and then fix the rest on the team repo.