chore(atlas-core): update changelogs (#282)

Author: uicontent

packages/atlas-core/CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## [4.3.0] Atlas Core - 2025-10-10
+
 ### Breaking change
 
 -   Layout Behavior: behavioral changes may be observed in layouts, particularly concerning the topbar component
@@ -18,7 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 -   Introduced configurable options for the topbar bottom border and sidebar border
 -   General layout improvements
 
-### Fixed 
+### Fixed
 
 -   We fixed an issue with sidebar menu not overlaying some elements in modern client.
 -   We fixed an issue where sr-only input checkbox still showed up in switch widget.