[clang-tools-extra] [clang-tidy] Add a fully custom message to `bugprone-unsafe-functions` (PR #162443)

[Baranov Victor via cfe-commits]

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@@ -314,6 +314,11 @@ Changes in existing checks
   <clang-tidy/checks/bugprone/unhandled-self-assignment>` check by adding
   an additional matcher that generalizes the copy-and-swap idiom pattern
   detection.
+  
+- Improved :doc:`bugprone-unsafe-functions
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vbvictor wrote:

This is potentially breaking change, We should place it in "Potentially Breaking Changes" section in the beginning of Release Notes.

https://github.com/llvm/llvm-project/pull/162443