[clang] [clang][C23] Support N3029 Improved Normal Enumerations (PR #103917)

[Mital Ashok via cfe-commits]

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@@ -125,6 +125,8 @@ C2y Feature Support
 C23 Feature Support
 ^^^^^^^^^^^^^^^^^^^
 
+- Clang now supports `N3029 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3017.htm>`_ Improved Normal Enumerations.
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MitalAshok wrote:

```suggestion
- Clang now supports `N3029 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3029.htm>`_ Improved Normal Enumerations.
```

https://github.com/llvm/llvm-project/pull/103917