docs: add changelog

Author: kenjis

user_guide_src/source/changelogs/v4.4.5.rst

@@ -30,6 +30,9 @@ Deprecations
 Bugs Fixed
 **********
 
+- **QueryBuilder:** Fixed a bug that the ``updateBatch()`` method does not work
+  due to type errors on PostgreSQL.
+
 See the repo's
 `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_
 for a complete list of bugs fixed.