Bump apps/mastodon from `b1d492f` to `d469247`
Bump apps/mastodon from `b1d492f` to `d469247`

Bumps [apps/mastodon](https://github.com/tootsuite/mastodon) from `b1d492f` to `d469247`.
- [Release notes](https://github.com/tootsuite/mastodon/releases)
- [Commits](https://github.com/tootsuite/mastodon/compare/b1d492f30a584a9e204ac1345e6508ed4acb44bd...d469247083dbbe5d4f09cc9d13a3ebd400e6068e)

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