Fix generated Turbopack GC option docs (#98888)
I was noticing the generated file change every time I ran `pnpm
swc-build-native`. This comment was added
[here](https://github.com/vercel/next.js/pull/98378/changes#diff-0db38a2a3ab56ce5ce08014e3f096a6043c5fedd54a4048d231de4cbaa4ed6f1R512)
in the generated file, but not in the source
