v2.8.21-canary.17

<!-- Release notes generated using configuration in .github/release.yml at v2.8.21-canary.17 -->

What's Changed

Changelog

• fix: Support turbo watch in single-package workspaces by @anthonyshew in https://github.com/vercel/turborepo/pull/12460

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.21-canary.16...v2.8.21-canary.17