docs: update "Migrate to async Dynamic APIs" docs (#72852)
### What?
Update the example code with Codemods applied in [Migrate to async
Dynamic
APIs](https://nextjs.org/docs/app/building-your-application/upgrading/codemods#migrate-to-async-dynamic-apis)
docs
Co-authored-by: Delba de Oliveira <32464864+delbaoliveira@users.noreply.github.com>
