chore(deps): bump chartkick from 5.2.0 to 5.2.1

Bumps [chartkick](https://github.com/ankane/chartkick) from 5.2.0 to 5.2.1.
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](ankane/chartkick@v5.2.0...v5.2.1)

---
updated-dependencies:
- dependency-name: chartkick
  dependency-version: 5.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -116,7 +116,7 @@ GEM
     bugsnag (6.28.0)
       concurrent-ruby (~> 1.0)
     builder (3.3.0)
-    chartkick (5.2.0)
+    chartkick (5.2.1)
     commander (5.0.0)
       highline (~> 3.0.0)
     commonmarker (0.23.10)