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

- Librarian Bot: Add language metadata for dataset (eadf29f85af635ec99aed2e59f5c3e0c4adef386)


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

README.md

@@ -1,3 +1,5 @@
 ---
+language:
+- de
 license: apache-2.0
 ---