[clang] [clang][Sema] Fix a bug when instantiating a lambda with requires clause (PR #65193)

[via cfe-commits]

https://github.com/cor3ntin commented:

I found a couple of typos, and this needs a release note to indicate https://github.com/llvm/llvm-project/issues/64462 was fixed.

I'd like @erichkeane to take a last look but otherwise I think this looks reasonable

(Sorry for the delay)

https://github.com/llvm/llvm-project/pull/65193