small bug fix

app.py

@@ -16,13 +16,13 @@ if file_url:
         st.toast("Using cached data")
         input_gdf = st.session_state.input_gdf
     else:
+        st.session_state.file_url = file_url
         if file_url.startswith("https://drive.google.com/file/d/"):
             ID = file_url.replace("https://drive.google.com/file/d/", "").split("/")[0]
             file_url = f"https://drive.google.com/uc?id={ID}"
 
         input_gdf = gpd.read_file(file_url)
         input_gdf = input_gdf.to_crs(epsg=7761)  # Gujarat zone
-        st.session_state.file_url = file_url
         st.session_state.input_gdf = input_gdf
         st.toast("Data loaded and cached")