Update changelog

Author: acelaya

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org).
 
-## [Unreleased]
+## [0.14.3] - 2025-06-16
 ### Added
 * *Nothing*
 
@@ -18,7 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 * *Nothing*
 
 ### Fixed
-* *Nothing*
+* Reduce sidebar z-index to be lower than shlink-frontend-kit's NavBar
 
 
 ## [0.14.2] - 2025-06-11