fixup: minor update to release notes

Author: a-nogikh

clang/docs/ReleaseNotes.rst

@@ -327,7 +327,7 @@ Attribute Changes in Clang
 - New format attributes ``gnu_printf``, ``gnu_scanf``, ``gnu_strftime`` and ``gnu_strfmon`` are added
   as aliases for ``printf``, ``scanf``, ``strftime`` and ``strfmon``. (#GH16219)
 
-- New function attribute `malloc_span` is added. Its semantics is similar to that of the `malloc`
+- New function attribute `malloc_span` is added. It has semantics similar to that of the `malloc`
   attribute, but `malloc_span` applies not to functions returning pointers, but to functions returning
   span-like structures (i.e. those that contain a pointer field and a size integer field).