Added license link

Author: CLSTR1

README.md

@@ -27,7 +27,7 @@ You can download this resourcepack on [CurseForge](https://www.curseforge.com/mi
 
 ## License
 
-This resource pack is licensed under CC BY-SA 4.0
+This resource pack is licensed under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)
 
 ## Issues