Update test-kitchen requirement from ~> 3.0.0 to ~> 3.1.1

Updates the requirements on [test-kitchen](https://github.com/test-kitchen/test-kitchen) to permit the latest version.
- [Release notes](https://github.com/test-kitchen/test-kitchen/releases)
- [Changelog](https://github.com/test-kitchen/test-kitchen/blob/master/CHANGELOG.md)
- [Commits](test-kitchen/test-kitchen@v3.0.0...v3.1.1)

---
updated-dependencies:
- dependency-name: test-kitchen
  dependency-type: direct:development
...

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

Author: dependabot[bot]

Gemfile

@@ -15,7 +15,7 @@ group :test do
   gem 'chefspec', '~> 9.3.0'
   gem 'kitchen-vagrant', '~> 1.10.0'
   gem 'safe_yaml', '~> 1.0.5'
-  gem 'test-kitchen', '~> 3.0.0'
+  gem 'test-kitchen', '~> 3.1.1'
 end
 
 group :aws do