[llvm] [Github] Build clang docs in CI if autogenerated files change (PR #72623)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

Still need to try and find a more scalable solution than copying and pasting the paths into three separate parts of the document. Will look into that in a bit.

https://github.com/llvm/llvm-project/pull/72623