[llvm] [GitHub] Add main LLVM Dialect path to MLIR LLVM PR subscribers (PR #65513)

[Mehdi Amini via llvm-commits]

Markus =?utf-8?q?Böck?= <markus.bock+llvm at nextsilicon.com>


https://github.com/joker-eph approved this pull request.

Thanks!

We're moving away from CODEOWNERS for subscription to replace it with a labeler solution, but feel free to land this though

https://github.com/llvm/llvm-project/pull/65513