build: bump @fluentui/react-datepicker-compat in /App/frontend-app

Bumps [@fluentui/react-datepicker-compat](https://github.com/microsoft/fluentui) from 0.4.51 to 0.4.57.
- [Release notes](https://github.com/microsoft/fluentui/releases)
- [Changelog](https://github.com/microsoft/fluentui/blob/master/azure-pipelines.release.yml)
- [Commits](https://github.com/microsoft/fluentui/compare/@fluentui/react-datepicker-compat_v0.4.51...@fluentui/react-datepicker-compat_v0.4.57)

---
updated-dependencies:
- dependency-name: "@fluentui/react-datepicker-compat"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]