Fix release notes

Author: badumbatish

clang/docs/ReleaseNotes.rst

@@ -546,7 +546,7 @@ NetBSD Support
 WebAssembly Support
 ^^^^^^^^^^^^^^^^^^^
 
-- Fix a bug so that __has_attribute(musttail) should not be true anymore when notail is not enabled.
+- Fix a bug so that ``__has_attribute(musttail)`` is no longer true when WebAssembly's tail-call is not enabled. (#GH163256)
 
 AVR Support
 ^^^^^^^^^^^