chore(@mendix/popup-menu-web): update changelog

Author: uicontent

packages/pluggableWidgets/popup-menu-web/CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [4.3.1] - 2026-07-17
+
 ### Fixed
 
 - We fixed an issue where the widget was not loading in the Dojo client due to a broken JavaScript bundle.