[clang-tools-extra] [Docs][clang-tools-extra] Convert maintainers list to .rst format (PR #165171)

[via cfe-commits]

================
@@ -2,9 +2,13 @@
 Clang Tools Extra Maintainers
 =============================
 
-This file is a list of the maintainers
-(https://llvm.org/docs/DeveloperPolicy.html#maintainers) for clang-tools-extra.
+This file is a list of the 
+`maintainers <https://llvm.org/docs/DeveloperPolicy.html#maintainers>`_
+for clang-tools-extra.
----------------
EugeneZelenko wrote:

`clang-tools-extra` seems to me like directory name. There is difference between `clang-tidy` and `Clang-Tidy` in documentation. Former should be always used with `:program:` prefix.

https://github.com/llvm/llvm-project/pull/165171