sysutils/rubygem-chef: Update to 18.2.7

• Update RUN_DEPENDS:
  • Change RUN_DEPENDS from rubygem-chef-config17 to rubygem-chef-config
  • Change RUN_DEPENDS from rubygem-chef-utils17 to rubygem-chef-utils
• Update version requirement of RUN_DEPENDS

Changes: https://github.com/chef/chef/blob/main/CHANGELOG.md

		https://docs.chef.io/release_notes_client/