Bump chartkick from 2.2.5 to 2.3.4
Bump chartkick from 2.2.5 to 2.3.4

Bumps [chartkick](https://github.com/ankane/chartkick) from 2.2.5 to 2.3.4.
- [Release notes](https://github.com/ankane/chartkick/releases)
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/chartkick/compare/v2.2.5...v2.3.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
coreyja/glassy-collections,coreyja/glassy-collections,coreyja/glassy-collections