chore(deps): bump chartkick from 4.2.1 to 5.1.2

Bumps [chartkick](https://github.com/ankane/chartkick) from 4.2.1 to 5.1.2.
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](ankane/chartkick@v4.2.1...v5.1.2)

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

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

Gemfile

@@ -80,7 +80,7 @@ end
 gem 'aws-sdk-s3'
 gem 'brakeman'
 gem 'bundler-audit'
-gem 'chartkick', '~> 4.2'
+gem 'chartkick', '~> 5.1'
 gem 'devise', '~> 4.8'
 gem 'groupdate'
 gem 'irb'

Gemfile.lock

@@ -121,7 +121,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    chartkick (4.2.1)
+    chartkick (5.1.2)
     concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     crass (1.0.6)
@@ -355,7 +355,7 @@ DEPENDENCIES
   brakeman
   bundler-audit
   capybara
-  chartkick (~> 4.2)
+  chartkick (~> 5.1)
   devise (~> 4.8)
   groupdate
   image_processing (~> 1.2)