[clang] Fix Clang release note documentation markup for nullability attributes.

Author: tahonermann

clang/docs/ReleaseNotes.rst

@@ -205,10 +205,10 @@ Attribute Changes in Clang
   to certain C++ class types, such as smart pointers:
   ``void useObject(std::unique_ptr<Object> _Nonnull obj);``.
 
-  This works for standard library types including ``unique_ptr``, ``shared_ptr``
-  and ``function``. See `the attribute reference
-documentation <https://llvm.org/docs/AttributeReference.html#nullability-attributes>`_
-for the full list.
+  This works for standard library types including ``unique_ptr``, ``shared_ptr``,
+  and ``function``. See
+  `the attribute reference documentation <https://llvm.org/docs/AttributeReference.html#nullability-attributes>`_
+  for the full list.
 
 - The ``_Nullable`` attribute can be applied to C++ class declarations:
   ``template <class T> class _Nullable MySmartPointer {};``.