Bump apps/feedbin from `c7f70d4` to `21d2bf4`
Bump apps/feedbin from `c7f70d4` to `21d2bf4`

Bumps [apps/feedbin](https://github.com/feedbin/feedbin) from `c7f70d4` to `21d2bf4`.
- [Release notes](https://github.com/feedbin/feedbin/releases)
- [Commits](https://github.com/feedbin/feedbin/compare/c7f70d47724770b5ea1b0bb1dc631f4ad0f6bfe1...21d2bf4bbfcd307164b72dbf32564e549b8041a1)

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