Update chefstyle requirement from 2.0.6 to 2.0.7

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@v2.0.6...v2.0.7)

---
updated-dependencies:
- dependency-name: chefstyle
  dependency-type: direct:development
...

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

Gemfile

@@ -13,5 +13,5 @@ group :debug do
 end
 
 group :chefstyle do
-  gem "chefstyle", "2.0.6"
+  gem "chefstyle", "2.0.7"
 end