chore: bump turbo to 2.0.9 (#68046)
## Why?
- Better package.json errors via
[#8299](https://github.com/vercel/turbo/pull/8299),
[#8753](https://github.com/vercel/turbo/pull/8753)
- Successful
[build-and-deploy](https://github.com/vercel/next.js/actions/runs/10127839598)
run
