Bump apps/mastodon from `bb9ca8a` to `9ea91bb`
Bump apps/mastodon from `bb9ca8a` to `9ea91bb`

Bumps [apps/mastodon](https://github.com/tootsuite/mastodon) from `bb9ca8a` to `9ea91bb`.
- [Release notes](https://github.com/tootsuite/mastodon/releases)
- [Commits](https://github.com/tootsuite/mastodon/compare/bb9ca8a587ee5a3ec8778e72828aca0ba8871327...9ea91bbf59df8140fcae9e64e8928eb5040ec85b)

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