PyDoc: Update GPU Example of `draw_view3d`

This function was changed in rBc8004ab4078c98c54a70113c12bbb186403e90cf but didnt update the example.

Part of T84227

doc/python_api/examples/gpu.9.py

@@ -31,7 +31,8 @@ def draw():
         context.space_data,
         context.region,
         view_matrix,
-        projection_matrix)
+        projection_matrix,
+        True)
 
     gpu.state.depth_mask_set(False)
     draw_texture_2d(offscreen.texture_color, (10, 10), WIDTH, HEIGHT)