Update README.md

Greaby · web-flow · commit c7855c32f483 · 2021-01-02T12:20:28.000+01:00
diff --git a/README.md b/README.md
@@ -3,3 +3,5 @@
 A really simple Minecraft datapack that adds spectator mode for everyone.
 
 Use `/trigger spec` to toggle the spectator mode
+
+[![License: CC0-1.0](https://img.shields.io/badge/License-CC0%201.0-lightgrey.svg)](http://creativecommons.org/publicdomain/zero/1.0/)
