Updated license in README.md.

Author: thebluepandabear

README.md

@@ -5,7 +5,7 @@
 
 [![Discord](https://img.shields.io/badge/Discord-PixaPencil-blue.svg)](https://discord.com/invite/Ytm7WBMNz9)
 [![Matrix](https://img.shields.io/badge/Matrix-PixaPencil-green.svg)](https://matrix.to/#/#pixapencil:matrix.org)
-[![License](https://img.shields.io/badge/License-MIT-red.svg)](https://choosealicense.com/licenses/mit/)
+[![License](https://img.shields.io/badge/License-MIT-red.svg)](https://choosealicense.com/licenses/gpl-3.0/)
 
 [<img src="https://github.com/machiav3lli/oandbackupx/blob/034b226cea5c1b30eb4f6a6f313e4dadcbb0ece4/badge_github.png" alt="Get it on GitHub" height="80">](https://github.com/therealbluepandabear/PixaPencil/releases/latest)
 [<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png" alt="Get it on F-Droid" height="80">](https://f-droid.org/en/packages/com.therealbluepandabear.pixapencil/)