Librarian Bot: Add language metadata for dataset (#2)

- Librarian Bot: Add language metadata for dataset (7f2d6788ebe03ecb3ab256c90f3ebf989831b9de)


Co-authored-by: Librarian Bot (Bot) <librarian-bot@users.noreply.huggingface.co>

README.md

@@ -1,4 +1,7 @@
 ---
+language:
+- en
+- ja
 dataset_info:
   features:
   - name: instruction