Update CHANGELOG.md

Author: Woody4618

CHANGELOG.md

@@ -5,10 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.2.5] - 2025-04-25
+## [0.2.6] - 2025-04-25
 
 - Updated Node.js requirement to >=20.11.1 for compatibility with @solana/codecs-numbers
 
+### Changed
+
 ## [0.2.4] - 2024-03-21
 
 ### Changed