Update doc/python/network-graphs.md

Author: LiamConnors

doc/python/network-graphs.md

@@ -134,7 +134,7 @@ fig = go.Figure(data=[edge_trace, node_trace],
                 hovermode='closest',
                 margin=dict(b=20,l=5,r=5,t=40),
                 annotations=[ dict(
-                    text="Python code: <a href='https://plotly.com/python/v3/ipython-notebooks/network-graphs/'> https://plotly.com/python/v3/ipython-notebooks/network-graphs/</a>",
+                    text="Python code: <a href='https://plotly.com/python/network-graphs/'> https://plotly.com/python/network-graphs/</a>",
                     showarrow=False,
                     xref="paper", yref="paper",
                     x=0.005, y=-0.002 ) ],