chore: updated clang release notes

Author: theomagellan

clang/docs/ReleaseNotes.rst

@@ -133,6 +133,8 @@ Modified Compiler Flags
   the behavior of ``-mtp`` in gcc. This changes the default behavior for ARM targets that provide the ``TPIDRURO`` register as this will be used instead of a call to the ``__aeabi_read_tp``.
   Programs that use ``__aeabi_read_tp`` but do not use the ``TPIDRURO`` register must use ``-mtp=soft``. Fixes #123864
 
+- `-Wpadded` option implemented for the `x86_64-windows-msvc` target. Fixes #61702
+
 Removed Compiler Flags
 -------------------------