Update wikipedia.py

wikipedia.py

@@ -938,7 +938,7 @@ class Wikipedia(datasets.ArrowBasedBuilder):
         warnings.warn(
             """
             This dataset is deprecated in favor of "wikimedia/wikipedia".
-            Use `datasets.load_dataset('wikimedia/wikipedia', '20231101.en')` to load the dataset instead.
+            Use `datasets.load_dataset('wikimedia/wikipedia', f'{date}.{lang_code}')` to load the dataset instead (e.g. '20231101.en').
             """, 
             FutureWarning,
         )