fix wording

app.py

@@ -229,7 +229,7 @@ def _user_update(hub_id: str, username: str) -> str:
         response += f"Dataset {hub_id} is already being tracked. \n\n"
     datasets_tracked_by_user = update_tracked_dataset_to_users(hub_id, username)
     response += (
-        "You are currently whether new models have been trained on"
+        "You are currently tracking whether new models have been trained on"
         f" {len(datasets_tracked_by_user)} datasets."
     )
     if datasets_tracked_by_user: