Update README.md

Author: esnanta

Diff for: README.md

@@ -1,4 +1,6 @@
 ATTENTION: THIS PROJECT HAS BEEN ABANDONED
+I only maintain for my personal use.
+Feel free to use if you need.
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 # Yii2-rbac [![Total Downloads](https://img.shields.io/packagist/dt/dektrium/yii2-rbac.svg?style=flat-square)](https://packagist.org/packages/dektrium/yii2-rbac) [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)