v2.8.18-canary.12

<!-- Release notes generated using configuration in .github/release.yml at v2.8.18-canary.12 -->

What's Changed

@turbo/codemod

• fix: Stop add-package-names codemod from silently renaming existing packages by @anthonyshew in https://github.com/vercel/turborepo/pull/12332

Changelog

• fix: Detect affected tasks with $TURBO_ROOT$ inputs when using affectedUsingTaskInputs by @anthonyshew in https://github.com/vercel/turborepo/pull/12331

Full Changelog: https://github.com/vercel/turborepo/compare/v2.8.18-canary.11...v2.8.18-canary.12