fixup! [clang][CodeGen][MSVC] Return vector types from methods indirectly

Tweak wording of ABI note and update release note to say Clang now matches MSVC.

Author: henrybw

clang/docs/ReleaseNotes.rst

@@ -90,11 +90,11 @@ C++ Specific Potentially Breaking Changes
 ABI Changes in This Version
 ---------------------------
 
-- Fixed Microsoft calling convention to return vector types from C++ member
-  functions indirectly. This change resolves incompatibilities with code
-  compiled by MSVC but will introduce incompatibilities with code compiled by
-  Clang 21 and earlier versions, unless the ``-fclang-abi-compat=21`` option is
-  used. (#GH104)
+- Fixed Microsoft calling convention to match how MSVC returns vector types from
+  C++ member functions on x86-64. This change resolves incompatibilities with
+  code compiled by MSVC but will introduce incompatibilities with code compiled
+  by Clang 21 and earlier versions, unless the ``-fclang-abi-compat=21`` option
+  is used. (#GH104)
 
 AST Dumping Potentially Breaking Changes
 ----------------------------------------

clang/include/clang/Basic/ABIVersions.def

@@ -129,8 +129,8 @@ ABI_VER_MAJOR(20)
 
 /// Attempt to be ABI-compatible with code generated by Clang 21.0.x.
 /// This causes clang to:
-///   - Return vector types directly from member functions on x86 and x86_64 on
-///     Windows, which is not compatible with the MSVC ABI.
+///   - Always return vector types directly from member functions on x86 and
+///     x86_64 on Windows, which is not compatible with the MSVC ABI.
 ABI_VER_MAJOR(21)
 
 /// Conform to the underlying platform's C and C++ ABIs as closely as we can.