fix metadata error (#2)

- fix metadata error (25ccccf3f62836dc09266e22a2377d83db6ab3a6)


Co-authored-by: Victor M <victor@users.noreply.huggingface.co>

README.md

@@ -1,6 +1,6 @@
 ---
 language: 
-  - English
+  - en
 tags:
 - MusicGeneration
 ---