Add changelog entries for PRs since 6.4.0.

Author: mdickinson

CHANGES.rst

@@ -1,6 +1,24 @@
 Traits CHANGELOG
 ================
 
+Release 6.4.1
+-------------
+
+Released: 2022-08-12
+
+This is a bugfix release that fixes wheel builds on Python 3.11 and
+fixes some distribution and testing issues with typing stubs.
+
+Fixes
+~~~~~
+* Update ``cibuildwheel`` to the latest version so that we get wheels for
+  Python 3.11. (#1711)
+* Rename ``requires_numpy_testing`` decorator to ``requires_numpy_typing``,
+  and have it check for ``numpy.typing``, not ``numpy.testing``. (#1710)
+* Fix missing ``numpy_examples`` directory in traits-stubs package data.
+  (#1709)
+
+
 Release 6.4.0
 -------------