Update CHANGELOG.md

Author: BruinGrowly

CHANGELOG.md

@@ -19,7 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
-## [1.0.0] - 2024-01-XX
+## [1.0.0] - 2025-10-31
 
 ### Added
 - **Initial release** of Python Code Harmonizer
@@ -56,7 +56,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
-## [0.1.0] - 2024-01-XX (Internal Development)
+## [0.1.0] - 2025-11-01 (Internal Development)
 
 ### Added
 - Initial proof of concept