Update CHANGELOG.md for 4.0.3

Author: isc-tleavitt

CHANGELOG.md

@@ -5,9 +5,9 @@ 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/spec/v2.0.0.html).
 
-## [4.0.3] - Unreleased
+## [4.0.3] - 2024-08-19
 
-### Changed 
+### Fixed 
 - #52: Method mapping code now doesn't use AST's endline_no property to support older python versions 
 - #53: Ignore traced commands from code without a class name