Update license

Update license to MIT

cc

@ylacombe
in case you can merge!

README.md

@@ -16,7 +16,7 @@ language:
 thumbnail: >-
   https://user-images.githubusercontent.com/5068315/230698495-cbb1ced9-c911-4c9a-941d-a1a4a1286ac6.png
 library: bark
-license: cc-by-nc-4.0
+license: mit
 tags:
 - bark
 - audio