chore(@mendix/rich-text-web): update changelog

Author: uicontent

packages/pluggableWidgets/rich-text-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] - 2024-10-29
+
 ### Breaking changes
 
 -   The Rich Text widget has been updated to use Quill V2 due to a license change in TinyMCE. Unlike TinyMCE, Quill V2 does not require rendering a separate iframe, which simplifies styling and content security configurations. Users should review and adjust their widget configurations after updating.