Navbar link hover color

Links turn red when hovering over them in the top navbar

I wonder if there's a better color in the Dask color palette we could use instead (https://marketing.dask.org/en/latest/colors.html)? Maybe white?

Start by inspecting the top navbar's hover styling and compare the current red color with the Dask color palette linked in the issue. Done means navbar links use an agreed palette color on hover instead of red, with the result checked in the rendered documentation theme.

Written by the indexing model from the issue text.