Prepare changelog for v4.6.3

Author: paulbalandan

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this library 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).
 
+## [v4.6.3](https://github.com/codeigniter4/translations/compare/v4.6.2...v4.6.3) - 2025-08-02
+
+### Changed
+
+- bn (Bengali)
+
 ## [v4.6.2](https://github.com/codeigniter4/translations/compare/v4.6.1...v4.6.2) - 2025-07-26
 
 ### Added