(Example) Update `with-opentelemetry` example. (#54775)
Updated with new `Metadata` API.
Here in this example there is `legacy.tsx` in `/pages` folder should i remove it or retain it??
Also in `/pages/legacy.tsx` we have defined `/preact-stars` route but we don't have the corresponding file.
I have remove `/preact-stars` from `/app/page.tsx` as there is no `/app/preact-stars/page.tsx` in this example.
And `/shared/fetch-github-stars.ts` is fetching only `next.js` stars.
Co-authored-by: Lee Robinson <9113740+leerob@users.noreply.github.com>
