small fix

app.py

@@ -65,7 +65,7 @@ if not file_url:
 
 if not file_url:
     st.warning(
-        "Please provide a KML or GeoJSON URL as a query parameter, e.g., `https://sustainabilitylabiitgn-ndvi-perg.hf.space?file_url=<your_file_url>` or upload a file."
+        "Please provide a KML or GeoJSON URL as a query parameter, e.g., `https://sustainabilitylabiitgn-bhuvan.hf.space/?file_url=<your_file_url>` or upload a file."
     )
     st.stop()