[llvm] [clang] [clang-tools-extra] Fix #35272: Don't replace typedefs in extern c scope (PR #69102)

[Piotr Zegar via cfe-commits]

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@@ -318,7 +318,8 @@ Changes in existing checks
 
 - Improved :doc:`modernize-use-using
   <clang-tidy/checks/modernize/use-using>` check to fix function pointer and
-  forward declared ``typedef`` correctly.
+  forward declared ``typedef`` correctly. Ignore ``typedef`` declaration in
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PiotrZSL wrote:

Actually release notes should say that new option IgnoreExternC were added to control whatever typedefs in extern C should be ignored.

https://github.com/llvm/llvm-project/pull/69102