Librarian Bot: Add language metadata for dataset (#1)

- Librarian Bot: Add language metadata for dataset (fa9632ccdd3603f9d1b5282d9667df3a6b2cbb50)


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

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- vi
 dataset_info:
   features:
   - name: sentence1