Update license badge from MIT to GPL-3.0

Author: mgonzs13

README.md

@@ -8,7 +8,7 @@
 
 <div align="center">
 
-[![License: MIT](https://img.shields.io/badge/GitHub-GPL--3.0-informational)](https://opensource.org/license/gpl-3-0)
+[![License: GPL-v3.0](https://img.shields.io/badge/GitHub-GPL--3.0-informational)](https://opensource.org/license/gpl-3-0)
 [![GitHub release](https://img.shields.io/github/release/uleroboticsgroup/yasmin.svg)](https://github.com/uleroboticsgroup/yasmin/releases)
 [![Code Size](https://img.shields.io/github/languages/code-size/uleroboticsgroup/yasmin.svg?branch=main)](https://github.com/uleroboticsgroup/yasmin?branch=main)
 [![Dependencies](https://img.shields.io/librariesio/github/uleroboticsgroup/yasmin?branch=main)](https://libraries.io/github/uleroboticsgroup/yasmin?branch=main)