chore(@mendix/app-events-web): update changelog

Author: uicontent

packages/pluggableWidgets/events-web/CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [1.0.0] - 2024-03-19
+
 ### Added
 
 -   initial version of app events with component load and unload