docs: Update changelog

Author: neznaika0

user_guide_src/source/changelogs/v4.6.0.rst

@@ -198,6 +198,7 @@ Removed Deprecated Items
 - **Logger:** The deprecated ``CodeIgniter\Log\Logger::cleanFilenames()`` and
   ``CodeIgniter\Test\TestLogger::cleanup()`` have been removed. Use the
   ``clean_path()`` function instead.
+  **Router:** The deprecated ``\CodeIgniter\Router\Exceptions\RedirectException`` has been removed. Use ``\CodeIgniter\HTTP\Exceptions\RedirectException`` instead.
 
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 Enhancements