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

- Librarian Bot: Add language metadata for dataset (1703e9ebe725c3cb527f0a3b44e0083a32ce6e3f)


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

README.md

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