Add rubygems links

templates/chef.md

@@ -34,13 +34,15 @@ You can override these using input variables, such as:
 At minimum, the following Ruby gems must be included for common testing tasks.
-- cookstyle
-- test-kitchen
-- kitchen-google
-- kitchen-inspec
-- chef
-- chefspec
-- rspec
+- [chef](https://rubygems.org/gems/chef)
+- [chefspec](https://rubygems.org/gems/chefspec)
+- [cookstyle](https://rubygems.org/gems/cookstyle)
+- [kitchen-google](https://rubygems.org/gems/kitchen-google)
+- [kitchen-inspec](https://rubygems.org/gems/kitchen-inspec)
+- [rspec](https://rubygems.org/gems/rspec)
+- [test-kitchen](https://rubygems.org/gems/test-kitchen)
+
+This has been tested on Ruby 2.6+
 ## Kitchen testing