Update to plotly.js 1.40.1 (#1134)

* Update to plotly.js 1.40.1

Author: jonmmease

_plotly_utils/basevalidators.py

@@ -1229,7 +1229,7 @@ def description(self):
       - One of the following named colorscales:
             ['Greys', 'YlGnBu', 'Greens', 'YlOrRd', 'Bluered', 'RdBu',
             'Reds', 'Blues', 'Picnic', 'Rainbow', 'Portland', 'Jet',
-            'Hot', 'Blackbody', 'Earth', 'Electric', 'Viridis', 'Cividis]
+            'Hot', 'Blackbody', 'Earth', 'Electric', 'Viridis', 'Cividis']
         """.format(plotly_name=self.plotly_name)
 
         return desc