Fix errant example with command and action
Fix errant example with command and action

Example should have had `command :allow`, as :allow is no longer an action.

chef-cookbooks/firewall,itmustbejj/firewall,williamsjj/firewall,johnbellone/firewall-cookbook,itmustbejj/firewall,johnbellone/firewall-cookbook,williamsjj/firewall,opscode-cookbooks/firewall,chef-cookbooks/firewall,opscode-cookbooks/firewall