Update dependency test-kitchen to v4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Gemfile

@@ -25,7 +25,7 @@ group :integration do
   gem 'kitchen-dokken'
   gem 'kitchen-inspec'
   gem 'kitchen-vagrant'
-  gem 'test-kitchen', '~> 3.0'
+  gem 'test-kitchen', '~> 4.0'
 end
 
 group :tools do