Bump apps/zammad from `8c6ac52` to `88d4e53`
Bump apps/zammad from `8c6ac52` to `88d4e53`

Bumps [apps/zammad](https://github.com/zammad/zammad) from `8c6ac52` to `88d4e53`.
- [Release notes](https://github.com/zammad/zammad/releases)
- [Commits](https://github.com/zammad/zammad/compare/8c6ac52ef6a8fecd2c49cebbd7a22e5eb805dad6...88d4e534b2cfaf70137297a51e8a0e02eee5ca4b)

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