⬆️ Bump chartkick from 5.1.0 to 5.1.1

Bumps [chartkick](https://github.com/ankane/chartkick) from 5.1.0 to 5.1.1.
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](ankane/chartkick@v5.1.0...v5.1.1)

---
updated-dependencies:
- dependency-name: chartkick
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -111,7 +111,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    chartkick (5.1.0)
+    chartkick (5.1.1)
     childprocess (5.1.0)
       logger (~> 1.5)
     clearance (2.8.0)