fix release version

Author: jleonardolemos

CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
 ## [Unreleased]
-## [v2.8.0]
+## [v3.0.0]
 ### Added
 - Support PHP 8.5