v2.8.18-canary.13

<!-- Release notes generated using configuration in .github/release.yml at v2.8.18-canary.13 -->

What's Changed

Changelog

• feat: Extend LogSink with task output and grouping support by @anthonyshew in https://github.com/vercel/turborepo/pull/12328
• fix: Support private GitHub repos in turbo gen workspace --copy by @anthonyshew in https://github.com/vercel/turborepo/pull/12333
• feat: Add GroupingLayer for per-task output buffering by @anthonyshew in https://github.com/vercel/turborepo/pull/12334

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.18-canary.12...v2.8.18-canary.13