[clang-tools-extra] [clang-tidy][NFC] add qutation mark for C++ classes in warning message (PR #109068)

[Carlos Galvez via cfe-commits]

https://github.com/carlosgalvezp approved this pull request.

LGTM, thanks for splitting the patch!

Personally I don't quite see the added value of having the quotes, I actually find them a bit noisy. It would have been good to write the motivation for this change in the commit message.

But this is quite subjective so if you find that it makes the diagnostic clearer then I won't object.

https://github.com/llvm/llvm-project/pull/109068