Update changelog for 0.5.3

Author: object-Object

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and [Pydantic's HISTORY.md](https://github.com/pydantic/pydantic/blob/main/HISTORY.md), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## `0.5.3` - 2025-09-03
+
+### Fixed
+
+* Updated githubkit to fix a validation error when using `/gh commit`.
+
 ## `0.5.2` - 2025-09-02
 
 ### Fixed