Bump apps/zammad from `1b21764` to `a7e1b64`
Bump apps/zammad from `1b21764` to `a7e1b64`

Bumps [apps/zammad](https://github.com/zammad/zammad) from `1b21764` to `a7e1b64`.
- [Release notes](https://github.com/zammad/zammad/releases)
- [Commits](https://github.com/zammad/zammad/compare/1b217645ccc14105629a812ad8e1f154384302e9...a7e1b64b955fc94378d667420d7944f5e43dde5b)

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