[clang] [NFC] Add release notes for -Wunsafe-buffer-usage-in-libc-call (PR #126975)

[Ziqing Luo via cfe-commits]

https://github.com/ziqingluo-90 created https://github.com/llvm/llvm-project/pull/126975

`-Wunsafe-buffer-usage-in-libc-call` is a subgroup of `-Wunsafe-buffer-usage` that warns about unsafe libc function calls.

>From 49cfb174e21290918d30928397e6d0d44a521b66 Mon Sep 17 00:00:00 2001
From: Ziqing Luo <ziqing_luo at apple.com>
Date: Wed, 12 Feb 2025 13:25:43 -0800
Subject: [PATCH] [NFC] Add release notes for
 -Wunsafe-buffer-usage-in-libc-call

`-Wunsafe-buffer-usage-in-libc-call` is a subgroup of
`-Wunsafe-buffer-usage` that warns about unsafe libc function calls.
---
 clang/docs/ReleaseNotes.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 6344c4b36e357..0e1cacaa76a35 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -135,6 +135,9 @@ Improvements to Clang's diagnostics
 - Fixed a bug where Clang's Analysis did not correctly model the destructor behavior of ``union`` members (#GH119415).
 - A statement attribute applied to a ``case`` label no longer suppresses
   'bypassing variable initialization' diagnostics (#84072).
+- The ``-Wunsafe-buffer-usage`` warning has been updated to warn
+  about unsafe libc function calls.  Those new warnings are emitted
+  under the subgroup ``-Wunsafe-buffer-usage-in-libc-call``.
 
 Improvements to Clang's time-trace
 ----------------------------------