Bump apps/mastodon from `4b2ec4a` to `f645dad`
Bump apps/mastodon from `4b2ec4a` to `f645dad`

Bumps [apps/mastodon](https://github.com/tootsuite/mastodon) from `4b2ec4a` to `f645dad`.
- [Release notes](https://github.com/tootsuite/mastodon/releases)
- [Commits](https://github.com/tootsuite/mastodon/compare/4b2ec4a2dc3348ff27f74f442e408d92075bf7c2...f645dad661ba033efdcdd6ca7597e7b8bc7f4f51)

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