chore(@mendix/slider-web): update changelog

Author: uicontent

packages/pluggableWidgets/slider-web/CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [2.1.1] - 2023-09-27
+
 ### Fixed
 
 -   We removed redundant code to improve widget load time in the browser.