v2.8.11-canary.18

<!-- Release notes generated using configuration in .github/release.yml at v2.8.11-canary.18 -->

What's Changed

Changelog

• perf: Replace libgit2 git status with gix-index for faster file hashing by @anthonyshew in https://github.com/vercel/turborepo/pull/11950

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.11-canary.17...v2.8.11-canary.18