Update voila_demo.ipynb

Author: tsutterley

examples/voila_demo.ipynb

@@ -164,9 +164,9 @@
     "    m = ipysliderule.leaflet(projection)\n",
     "    # install click handler callback\n",
     "    m.add_selected_callback(SRwidgets.atl06_click_handler)\n",
-    "    # out.append_display_data(display.display(m.map))\n",
     "    display.display(m.map)\n",
     "\n",
+    "# interactively change map when projection widget is changed\n",
     "out = widgets.interactive_output(create_map, dict(projection=SRwidgets.projection))\n",
     "display.display(out)\n",
     "display.display(run_output)"