adjust badge for php 8.3

Author: doppynl

README.md

@@ -1,6 +1,6 @@
 # PHP Language Extensions (currently in BETA)
 
-[![PHP versions: 8.0 to 8.2](https://img.shields.io/badge/php-8.0|8.1|8.2-blue.svg)](https://packagist.org/packages/dave-liddament/php-language-extensions)
+[![PHP versions: 8.0 to 8.3](https://img.shields.io/badge/php-8.0|8.1|8.2|8.3-blue.svg)](https://packagist.org/packages/dave-liddament/php-language-extensions)
 [![Latest Stable Version](https://poser.pugx.org/dave-liddament/php-language-extensions/v/stable)](https://packagist.org/packages/dave-liddament/php-language-extensions)
 [![License](https://poser.pugx.org/dave-liddament/php-language-extensions/license)](https://github.com/DaveLiddament/php-language-extensions/blob/main/LICENSE.md)
 [![Total Downloads](https://poser.pugx.org/dave-liddament/php-language-extensions/downloads)](https://packagist.org/packages/dave-liddament/php-language-extensions/stats)