docs: link ensureStatic TypeScript hints to its API reference (#100033)
## Summary
The TypeScript language-service hints for the `ensureStatic` route
segment config pointed at `(docs coming soon)`, so hovering the export
in an editor gave no path to its API reference, which now exists. This
points the hint at that page and states in the `'prefetch'` option hint
that forcing a static prefetch stops runtime prefetch requests, while
request-specific content behind `<Suspense>` still renders during
navigation.
Maintainer dashboard:
https://next-maintainer-agent.vercel.tools/investigations/feedback/149
DX Agent feedback:
https://dxagent.labs.vercel.dev/dashboard/feedback/d98438c6-3ff3-4239-b5f9-5ccde3fe7b52
## Verification
- `npx prettier --check
packages/next/src/server/typescript/rules/config.ts`
<!-- NEXT_JS_LLM -->
Prepared in fork:
https://github.com/vercel-labs/next.js-experimental/pull/256
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Co-authored-by: vercel-gh-bot-2[bot] <282331341+vercel-gh-bot-2[bot]@users.noreply.github.com>