[Tagging] natural=bay on areas

[Andrew Harvey]

The wiki for natural=bay says "Since bays are generally part of a
larger waterbody, either a lake or the ocean, they should not be
rendered in solid color indicating water themselves."

This creates a conflict with a recent change to Botany Bay
https://www.openstreetmap.org/relation/1214649 in
https://www.openstreetmap.org/changeset/47138016.

It was changed from natural=water, water=bay to natural=bay. However
it most definitely should be rendered as water, contrary to the advice
on the wiki.

What should we do to fix this? Change the wiki to note that it should
be rendered as water and fix renders?