Update README.md

Author: Amadeco

README.md

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 [![Magento 2](https://img.shields.io/badge/Magento-2.4.x-brightgreen.svg)](https://magento.com)
 [![PHP](https://img.shields.io/badge/PHP-8.1|8.2|8.3-blue.svg)](https://www.php.net)
 [![License](https://img.shields.io/github/license/iparmentier/magento2-smile-custom-entity-widget)](https://github.com/iparmentier/magento2-smile-custom-entity-widget/blob/main/LICENSE.txt)
+
 [SPONSOR: Amadeco](https://www.amadeco.fr)
 
 ## Overview