chore: readme shield

Author: Times-Z

readme.md

@@ -8,7 +8,7 @@
 [![Build status main](https://img.shields.io/github/actions/workflow/status/Times-Z/GeekMagic-Open-Firmware/.github/workflows/ci.yml?branch=main&label=Pipeline%20Status%20main&style=for-the-badge&logo=star)](https://github.com/Times-Z/GeekMagic-Open-Firmware/actions)
 
 [![Build status develop](https://img.shields.io/github/actions/workflow/status/Times-Z/GeekMagic-Open-Firmware/.github/workflows/ci.yml?branch=develop&label=Pipeline%20Status%20develop&style=for-the-badge&logo=star)](https://github.com/Times-Z/GeekMagic-Open-Firmware/actions)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg?style=for-the-badge)](LICENSE)
+[![License: GPLV3](https://img.shields.io/badge/License-GPLV3-yellow.svg?style=for-the-badge)](LICENSE)
 
 ## Table of Contents