fix: update version badge in README.md to display correct version

Author: awu

README.md

@@ -2,7 +2,7 @@
 
 [![PHP-Tests](https://github.com/wundii/data-mapper-symfony-bundle/actions/workflows/code_quality.yml/badge.svg)](https://github.com/wundii/data-mapper-symfony-bundle/actions/workflows/code_quality.yml)
 [![PHPStan](https://img.shields.io/badge/PHPStan-level%209-brightgreen.svg?style=flat)](https://phpstan.org/)
-[![VERSION](https://img.shields.io/packagist/v/wundii/data-mapper-symfony-bundle)]
+![VERSION](https://img.shields.io/packagist/v/wundii/data-mapper-symfony-bundle)
 [![PHP](https://img.shields.io/packagist/php-v/wundii/data-mapper-symfony-bundle)](https://www.php.net/)
 [![Rector](https://img.shields.io/badge/Rector-8.2-blue.svg?style=flat)](https://getrector.com)
 [![ECS](https://img.shields.io/badge/ECS-check-blue.svg?style=flat)](https://tomasvotruba.com/blog/zen-config-in-ecs)