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

- Librarian Bot: Add language metadata for dataset (bdf3021c1fd1a25c011c95ebc428ef1ad525dd73)


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

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- pl
 dataset_info:
   features:
   - name: text