Update changelog

Author: GromNaN

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## v0.17.0
+### Changed
+- Refactored into a single `OpenAI\Symfony\OpenAIBundle` class
+- Add `project` and `base_uri` configuration options
+- Drop support for unsupported Symfony versions. Now requires Symfony 6.4 or 7.3+
+
 ## v0.12.0 (2025-05-06)
 ### Changed
 - Changed underlying `openai/client` package version to 0.12.0