Fix missing line

Author: jhuber6

clang/docs/ReleaseNotes.rst

@@ -149,6 +149,7 @@ Non-comprehensive list of changes in this release
 - Use of ``__has_feature`` to detect the ``ptrauth_qualifier`` and ``ptrauth_intrinsics``
   features has been deprecated, and is restricted to the arm64e target only. The
   correct method to check for these features is to test for the ``__PTRAUTH__``
+  macro.
 
 - Added a new builtin, ``__builtin_dedup_pack``, to remove duplicate types from a parameter pack.
   This feature is particularly useful in template metaprogramming for normalizing type lists.