Add sponsor link

Author: natanfelles

README.md

@@ -8,4 +8,4 @@
 [![pipeline](https://gitlab.com/aplus-framework/libraries/database/badges/master/pipeline.svg)](https://gitlab.com/aplus-framework/libraries/database/-/pipelines?scope=branches)
 [![coverage](https://gitlab.com/aplus-framework/libraries/database/badges/master/coverage.svg?job=test:php)](https://aplus-framework.gitlab.io/libraries/database/coverage/)
 [![packagist](https://img.shields.io/packagist/v/aplus/database)](https://packagist.org/packages/aplus/database)
-[![open-source](https://img.shields.io/badge/open--source-donate-magenta)](https://www.paypal.com/donate/?hosted_button_id=NGBNW5PY4VSJ4)
+[![open-source](https://img.shields.io/badge/open--source-sponsor-magenta)](https://aplus-framework.com/sponsor)