[clang-tools-extra] [clang-tidy] Update google todo checker with style guide changes. (PR #165565)

[via cfe-commits]

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@@ -426,6 +426,13 @@ Changes in existing checks
   <clang-tidy/checks/readability/uppercase-literal-suffix>` check to recognize
   literal suffixes added in C++23 and C23.
 
+- Improved :doc:`google-readability-todo
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EugeneZelenko wrote:

Please keep alphabetical order (by check name) in this list.

One sentence is enough for Release Notes. Rest belongs to check documentation.

https://github.com/llvm/llvm-project/pull/165565