chore(examples): update turborepo examples link (#40487)

## Documentation / Examples

We now maintain a landing page of all monorepo examples with Next.js apps. We can point users here instead. 

- [X] Make sure the linting passes by running `pnpm lint`
- [X] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples)

examples/with-turbo/README.md

@@ -1,3 +1,3 @@
 The official examples are maintained by the Turborepo team:
 
-- [Typescript](https://github.com/vercel/turborepo/tree/main/examples/basic)
+- [Turborepo + Next.js Examples](https://github.com/vercel/turborepo/tree/main/examples/with-nextjs)