docs: add changelog

Author: kenjis

user_guide_src/source/changelogs/v4.2.2.rst

@@ -14,6 +14,7 @@ BREAKING
 
 - Now ``Services::request()`` returns ``IncomingRequest`` or ``CLIRequest``.
 - The method signature of ``CodeIgniter\Debug\Exceptions::__construct()`` has been changed. The ``IncomingRequest`` typehint on the ``$request`` parameter was removed. Extending classes should likewise remove the parameter so as not to break LSP.
+- The method signature of ``BaseBuilder.php::insert()`` and ``BaseBuilder.php::update()`` have been changed. The ``?array`` typehint on the ``$set`` parameter was removed.
 
 Enhancements
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