Ensure children prop of Field component can be a render prop

[RobinMalfait]

This PR ensures that the Field can be used using a render prop as the children of the Field component.

This means that we can now do this again:

<Field>
  {({ disabled }) => {
    return <input className={disabled ? "..." : "..."} />;
  }}
</Field>

This normally works in every component, but it was missing because we were manually wrapping the children in a component and forgot to handle this case.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
headlessui-react	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 23, 2024 0:59am
headlessui-vue	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 23, 2024 0:59am