Update CHANGELOG

Author: webeweb

CHANGELOG.md

@@ -1,9 +1,13 @@
 CHANGELOG
 =========
 
+### [3.9.0](https://github.com/webeweb/pexels-library/tree/v3.9.0) (2025-09-26)
+
+- Improve code quality
+
 ### [3.8.0](https://github.com/webeweb/pexels-library/tree/v3.8.0) (2025-08-09)
 
-- Add PHP 8.3 support
+- Add PHP 8.4 support
 
 ### [3.7.1](https://github.com/webeweb/pexels-library/tree/v3.7.1) (2024-05-28)