Bump scheduler from 0.20.2 to 0.23.2 in /app/frontend

Bumps [scheduler](https://github.com/facebook/react/tree/HEAD/packages/scheduler) from 0.20.2 to 0.23.2.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/HEAD/packages/scheduler)

---
updated-dependencies:
- dependency-name: scheduler
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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