Update histograms.md

Author: nicolaskruchten

doc/python/histograms.md

@@ -30,7 +30,9 @@ jupyter:
     order: 3
     page_type: example_index
     permalink: python/histograms/
-    redirect_from: /python/histogram-tutorial/
+    redirect_from: 
+      - /python/histogram-tutorial/
+      - /python/histogram/
     thumbnail: thumbnail/histogram.jpg
 ---
 
@@ -392,4 +394,4 @@ fig.show()
 
 #### Reference
 
-See https://plotly.com/python/reference/histogram/ for more information and chart attribute options!
+See https://plotly.com/python/reference/histogram/ for more information and chart attribute options!