Fix `license` metadata (#1)

- Fix `license` metadata (4fe5b5a1b81509b8147bc607d43347a8564a4630)


Co-authored-by: Julien Chaumond <julien-c@users.noreply.huggingface.co>

README.md

@@ -1,7 +1,7 @@
 ---
-languages:
+language:
 - java
-licenses:
+license:
 - mit
 multilinguality:
 - monolingual