Document that controling displayed value in Select is recommended for SSR

[peteruithoven]

Documentation

Currently the Radix Select, when it's server side rendered, will briefly be shown empty until client side JavaScript fills in the value:

Radix.select.with.Next.trimmed.mp4

The solution is to control the value displayed in the trigger, so this can also be done server side, which is documented in the following section:
https://www.radix-ui.com/primitives/docs/components/select#controlling-the-value-displayed-in-the-trigger

I learned about this from the following suggestion in an issue.
radix-ui/primitives#1642 (comment)

I would like to suggest clarifying that this is needed for SSR, by for example adding to the end:

Doing this is also recommended to have the value filled in during SSR (Server Side Rendering) by for example Next.js.

Relevant Radix Component(s)

Select