⬆ Bump @chakra-ui/react from 3.8.0 to 3.21.1 in /frontend

---
updated-dependencies:
- dependency-name: "@chakra-ui/react"
  dependency-version: 3.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]