chore: updated changelog

Author: raideer

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to the "magento-toolbox" extension will be documented in thi
 
 Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
-## [Unreleased]
+## [1.3.1] - 2025-03-23
 - Fixed: Generated plugin class arguments contain an incorrect namespace
 
 ## [1.3.0] - 2025-03-17