[clang] [clang-tools-extra] [llvm] Fix some typos (PR #123506)

[via llvm-commits]

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@@ -50,7 +50,7 @@ documentation refer to `GitHub's documentation <https://docs.github.com/pull-req
 .. note::
    If you are using a Pull Request for purposes other than review
    (eg: precommit CI results, convenient web-based reverts, etc)
-   `skip-precommit-approval <https://github.com/llvm/llvm-project/labels?q=skip-precommit-approval>`_
+   add a `skip-precommit-approval <https://github.com/llvm/llvm-project/labels?q=skip-precommit-approval>`_
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DeNiCoN wrote:

fixed

https://github.com/llvm/llvm-project/pull/123506