chore(deps): update rubocop-config digest to 9f3e5cd

Author: renovate[bot]

Gemfile

@@ -14,7 +14,7 @@ group :test do
   gem 'capybara'
   gem 'rackup'
   gem 'rspec', '~> 3.12'
-  gem 'rubocop-config', github: 'jgraichen/rubocop-config', ref: '7011bc14dbbf46e9bb240403feef25f7f6bb8dd3', require: false
+  gem 'rubocop-config', github: 'jgraichen/rubocop-config', ref: '9f3e5cd0e519811a7f615f265fca81a4f4e843b9', require: false
   gem 'selenium-webdriver'
   gem 'webrick'
 end