Update doc/python/sankey-diagram.md

Co-authored-by: Chris Parmer <[email protected]>

Author: LiamConnors

Diff for: doc/python/sankey-diagram.md

@@ -220,19 +220,20 @@ Create a Sankey diagram with arrow links by setting the `arrowlen` attribute of
 import plotly.graph_objects as go
 
 fig = go.Figure(go.Sankey(
-    arrangement = "snap",
-    node = dict(
-        label = ["A", "B", "C", "D", "E", "F"],
-        x = [0.2, 0.1, 0.5, 0.7, 0.3, 0.5],
-        y = [0.7, 0.5, 0.2, 0.4, 0.2, 0.3],
-        pad = 10  
+    arrangement='snap',
+    node=dict(
+        label=['A', 'B', 'C', 'D', 'E', 'F'],
+        x=[0.2, 0.1, 0.5, 0.7, 0.3, 0.5],
+        y=[0.7, 0.5, 0.2, 0.4, 0.2, 0.3],
+        pad=10  
     ),
-    link = dict(
-        arrowlen = 15,
-        source = [0, 0, 1, 2, 5, 4, 3, 5],
-        target = [5, 3, 4, 3, 0, 2, 2, 3],
-        value = [1, 2, 1, 1, 1, 1, 1, 2]  
-    )))
+    link=dict(
+        arrowlen=15,
+        source=[0, 0, 1, 2, 5, 4, 3, 5],
+        target=[5, 3, 4, 3, 0, 2, 2, 3],
+        value=[1, 2, 1, 1, 1, 1, 1, 2]  
+    )
+))
 
 fig.show()
 ```