docs: make the code match the tutorial page code

Author: UlysseDurand

01_vtk/solution_cone.py

@@ -55,7 +55,8 @@
             fluid=True,
             classes="pa-0 fill-height",
         ):
-            view = vtk.VtkLocalView(renderWindow)
+            html_view = vtk.VtkLocalView(renderWindow)
+            ctrl.on_server_ready.add(html_view.update)
 
 
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