v2.9.7-canary.4

<!-- Release notes generated using configuration in .github/release.yml at v2.9.7-canary.4 -->

What's Changed

Changelog

• feat: Graceful shutdown by @anthonyshew in https://github.com/vercel/turborepo/pull/12607

Full Changelog: https://github.com/vercel/turborepo/compare/v2.9.7-canary.3...v2.9.7-canary.4