Bump apps/mastodon from `4351228` to `9b74f6a`
Bump apps/mastodon from `4351228` to `9b74f6a`

Bumps [apps/mastodon](https://github.com/tootsuite/mastodon) from `4351228` to `9b74f6a`.
- [Release notes](https://github.com/tootsuite/mastodon/releases)
- [Commits](https://github.com/tootsuite/mastodon/compare/4351228338a54bfd8b1080148a51f6f7afa22689...9b74f6aca6aa3d130895c4737d1fa1db4fcffb5c)

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