[llvm-branch-commits] [clang-tools-extra] [clang-tidy][docs] Rewrite readability check docs to Markdown [3/5] (PR #221534)

[via llvm-branch-commits]

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

But please wait for @vbvictor review.

https://github.com/llvm/llvm-project/pull/221534