v2.8.17-canary.6

<!-- Release notes generated using configuration in .github/release.yml at v2.8.17-canary.6 -->

What's Changed

Changelog

• fix: Cap rayon thread pool and block_in_place in tokio to prevent deadlock potential by @anthonyshew in https://github.com/vercel/turborepo/pull/12253

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.17-canary.5...v2.8.17-canary.6