Bump engines/chartkick from `53b4497` to `0f9aa51`
Bump engines/chartkick from `53b4497` to `0f9aa51`

Bumps [engines/chartkick](https://github.com/ankane/chartkick) from `53b4497` to `0f9aa51`.
- [Release notes](https://github.com/ankane/chartkick/releases)
- [Commits](https://github.com/ankane/chartkick/compare/53b4497a606a00f45c0a9a6cb47f60735c7398ac...0f9aa517f01c4242562735a8b2cd316cc627293c)

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