[clang-tools-extra] [clang-apply-replacements] Add support for the `.yml` file extension (PR #78842)

[Piotr Zegar via cfe-commits]

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

LGTM, you may want to wait like 1-2 day before merging so if someone else would have some comments.

https://github.com/llvm/llvm-project/pull/78842