bug(website): `Combobox` components does not close automatically after choosing an option while in form

[PiotrekPKP]

As said in the title, Combobox components does not close automatically after choosing an option while in form.

The demo I'm talking about is here: https://ui.shadcn.com/docs/components/combobox#react-hook-form

The component works as expected everywhere else. I haven't checked if it's an issue only on the website or if apps using the component behave differently.

Also, I now see there's another issue with the Combobox component on the website: #562