docs: fix stable version badge

Author: brotkrueml

README.md

@@ -1,7 +1,7 @@
 # JobRouter Client
 
 [![CI Status](https://github.com/jobrouter/php-rest-client/workflows/CI/badge.svg?branch=main)](https://github.com/jobrouter/php-rest-client/actions?query=workflow%3ACI)
-[![Latest Stable Version](https://img.shields.io/packagist/v/jobrouter/php-rest-client.svg?label=stable)](https://packagist.org/packages/jobrouter/php-rest-client)
+[![Latest Stable Version](https://img.shields.io/packagist/v/jobrouter/rest-client.svg?label=stable)](https://packagist.org/packages/jobrouter/rest-client)
 
 [JobRouter®](https://www.jobrouter.com/) is a scalable digitalisation platform which links processes, data and
 documents. This JobRouter Client eases the access to the REST API.