Fix `language` tag (#1)

- Fix `language` tag (3211367f4c87d76bff7f436369c8beac4ffe3ff5)


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

README.md

@@ -1,5 +1,7 @@
 ---
-language: en, ja
+language:
+- en
+- ja
 license: mit
 datasets:
 - snow_simplified_japanese_corpus