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

[Aaron Ballman 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 `Extra Clang Tools <https://clang.llvm.org/extra/index.html>`_ project.
----------------
AaronBallman wrote:

```suggestion
for the `clang-tools-extra <https://clang.llvm.org/extra/index.html>`_ project.
```

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