Dropdown Data Update - Docs

[Sednaoui]

Hi! First time contributor, one year user for plotly.js and now plotly.py. Great library! :)

While looking at this example in the docs, the updatemenus in dropdowns menu for modifying the data is not working as expected.

It is expected to hide other data when clicking on a single option [High, Low] and only showing all data when clicking on the "Both" option. On top of that, it is not showing the average line of high and low when clicking on either one. Am I missing something?

[Sednaoui]

just saw this open PR. It should fix it: #3290