`movedTo` link in documentation is a 404

[smarter]

https://dotty.epfl.ch/docs/reference/language-versions/source-compatibility.html points to https://docs.scala-lang.org/scala3/reference/language-versions.html which doesn't exist. I haven't checked if other pages have the same issue.

[bishabosha]

I think the correct link is https://docs.scala-lang.org/scala3/reference/language-versions

[pikinier20]

This is going to be resolved by: #15146

[ckipp01]

This is going to be resolved by: #15146

Since this has been merged and the original issue seems to be fixed, I'll go ahead and close this. Please do report back if there is still something missing here.