[clang-tools-extra] [clang-tidy] Avoid recommending links to non-free coding guidelines (PR #160745)

[Baranov Victor via cfe-commits]

================
@@ -436,7 +436,7 @@ in the release notes, as the first sentence in the doxygen comments in the heade
 for your check class and as the first sentence of the check documentation.  Avoid the
 phrase "this check" in your check summary and check documentation.
 
-If your check relates to a published coding guideline (C++ Core Guidelines, MISRA, etc.)
+If your check relates to a freely licensed coding guideline (C++ Core Guidelines, etc.)
----------------
vbvictor wrote:

Oh maybe include CERT as a substitute to MISRA. 

https://github.com/llvm/llvm-project/pull/160745