Release entry

Author: zyn0217

clang/docs/ReleaseNotes.rst

@@ -714,6 +714,7 @@ Bug Fixes to C++ Support
   assumption if they also occur inside of a dependent lambda. (#GH114787)
 - Clang now uses valid deduced type locations when diagnosing functions with trailing return type
   missing placeholder return type. (#GH78694)
+- Fixed a bug where bounds of partially expanded pack indexing expressions were checked too early. (#GH116105)
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^