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]
 
+## [4.0.0] - 2024-11-13
+
 ### Breaking changes
 
 -   We moved the widget styling to Atlas core to make exclusion variables work. Please update atlas-core module to a minimum 3.15.0 for Studio Pro 10.6.0 and above or 3.12.5 for below to keep the styling intact.