Update ReleaseNotes.rst

YexuanXiao · YexuanXiao · commit 18523f1a92f7 · 2025-07-08T18:17:27.000+08:00
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
@@ -46,6 +46,7 @@ Potentially Breaking Changes
   ``endbr64`` instruction at the labels named as possible branch
   destinations, so it is not safe to use a register-controlled branch
   instruction to branch to one. (In line with gcc.)
+- Added a sugar type `PredefinedSugarType` to improve diagnostic messages. (#GH143653)
 
 C/C++ Language Potentially Breaking Changes
 -------------------------------------------
