RSC with delay example broken

[carledwardfp]

Steps to Reproduce:

1. Clone the repository
2. Run locally
3. Go to /slow
4. It will show this error: Error: storyIds.slice is not a function

Fix:

function NewsWithData() {
  const { data: storyIds } = useData('top', () => fetchData('topstories', 500))
  return (
    <>
      {storyIds
        ? storyIds.slice(0, 30).map((id) => {
            return (
              <Suspense key={id} fallback={<Spinner />}>
                <StoryWithData id={id} />
              </Suspense>
            )
          })
        : null}
    </>
  )
}