Bump aws-amplify from 4.3.21 to 4.3.31 in /src/react-frontend

Bumps [aws-amplify](https://github.com/aws-amplify/amplify-js) from 4.3.21 to 4.3.31.
- [Release notes](https://github.com/aws-amplify/amplify-js/releases)
- [Changelog](https://github.com/aws-amplify/amplify-js/blob/main/docs/changelog.md)
- [Commits](https://github.com/aws-amplify/amplify-js/compare/[email protected]@4.3.31)

---
updated-dependencies:
- dependency-name: aws-amplify
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]