[CSR-0] chore: Bump turbo from 2.8.20 to 2.8.21 (#338)

Bumps [turbo](https://github.com/vercel/turborepo) from 2.8.20 to 2.8.21.
- [Release notes](https://github.com/vercel/turborepo/releases)
- [Changelog](https://github.com/vercel/turborepo/blob/main/RELEASE.md)
- [Commits](vercel/turborepo@v2.8.20...v2.8.21)

---
updated-dependencies:
- dependency-name: turbo
  dependency-version: 2.8.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "eslint-config-prettier": "^10.0.0",
     "eslint-plugin-turbo": "^2.0.0",
     "prettier": "^3.6.2",
-    "turbo": "^2.8.13"
+    "turbo": "^2.8.21"
   },
   "packageManager": "npm@10.5.0"
 }