README: fix a badge

The `poser.pugx.org` isn't working half the time and broken badges do not look good.

Author: jrfnl

README.md

@@ -4,7 +4,7 @@ PHP Console Highlighter
 [![Downloads this Month](https://img.shields.io/packagist/dm/php-parallel-lint/php-console-highlighter.svg)](https://packagist.org/packages/php-parallel-lint/php-console-highlighter)
 [![CS](https://github.com/php-parallel-lint/PHP-Console-Highlighter/actions/workflows/cs.yml/badge.svg)](https://github.com/php-parallel-lint/PHP-Console-Highlighter/actions/workflows/cs.yml)
 [![Test](https://github.com/php-parallel-lint/PHP-Console-Highlighter/actions/workflows/test.yml/badge.svg)](https://github.com/php-parallel-lint/PHP-Console-Highlighter/actions/workflows/test.yml)
-[![License](https://poser.pugx.org/php-parallel-lint/php-console-highlighter/license.svg)](https://packagist.org/packages/php-parallel-lint/php-console-highlighter)
+[![License](https://img.shields.io/github/license/php-parallel-lint/PHP-Console-Highlighter)](https://packagist.org/packages/php-parallel-lint/php-console-highlighter)
 [![Coverage Status](https://coveralls.io/repos/github/php-parallel-lint/PHP-Console-Highlighter/badge.svg?branch=master)](https://coveralls.io/github/php-parallel-lint/PHP-Console-Highlighter?branch=master)
 
 Highlight PHP code in console (terminal).