Update chefstyle requirement from = 1.4.3 to = 1.4.4

Updates the requirements on [chefstyle](https://github.com/chef/chefstyle) to permit the latest version.
- [Release notes](https://github.com/chef/chefstyle/releases)
- [Changelog](https://github.com/chef/chefstyle/blob/master/CHANGELOG.md)
- [Commits](chef/chefstyle@v1.4.3...v1.4.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

kitchen-ec2.gemspec

@@ -29,6 +29,6 @@ Gem::Specification.new do |gem|
   # style and complexity libraries are tightly version pinned as newer releases
   # may introduce new and undesireable style choices which would be immediately
   # enforced in CI
-  gem.add_development_dependency "chefstyle", "= 1.4.3"
+  gem.add_development_dependency "chefstyle", "= 1.4.4"
   gem.add_development_dependency "climate_control"
 end