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

- Librarian Bot: Add language metadata for dataset (6f0e8b8d7b9ba46e7a3c23ebd7c9dbafd01d1937)


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

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- en
 dataset_info:
   features:
   - name: prompt