v2.8.21-canary.2

<!-- Release notes generated using configuration in .github/release.yml at v2.8.21-canary.2 -->

What's Changed

Docs

• fix: Strip JSX components from heading anchors and TOC entries by @anthonyshew in https://github.com/vercel/turborepo/pull/12404

Changelog

• fix: Move docs app icons into app/ directory by @anthonyshew in https://github.com/vercel/turborepo/pull/12403
• feat: Add experimental structured logging with --json and --log-file flags by @anthonyshew in https://github.com/vercel/turborepo/pull/12405
• docs: Downgrade Next.js by @anthonyshew in https://github.com/vercel/turborepo/pull/12408

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.21-canary.1...v2.8.21-canary.2