Bump apps/fr-staffapp from `c1e832e` to `15bfe57`
Bump apps/fr-staffapp from `c1e832e` to `15bfe57`

Bumps [apps/fr-staffapp](https://github.com/ministryofjustice/fr-staffapp) from `c1e832e` to `15bfe57`.
- [Release notes](https://github.com/ministryofjustice/fr-staffapp/releases)
- [Commits](https://github.com/ministryofjustice/fr-staffapp/compare/c1e832e5a61479267cc67b04e994dcfb5aaf0366...15bfe5771f80c29d602a40d1c5806e959258f38e)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
eliotsykes/real-world-rails