Fixed typo in vagrant provision-controller.sh

Author: mboersma

contrib/vagrant/provision-controller.sh

@@ -119,7 +119,7 @@ fi
 popd
 
 echo_color "Setting devmode flag on 'deis-controller'..."
-knife exec -E 'nodes.transform("name:deis-controller") {|n| n.normal_attrs["deis"]["devmode"] = true; n.save }
+knife exec -E 'nodes.transform("name:deis-controller") {|n| n.normal_attrs["deis"]["devmode"] = true; n.save }'
 
 # Need Chef admin permission in order to add and remove nodes and clients
 echo -e "\033[35mPlease ensure that \"deis-controller\" is added to the Chef \"admins\" group.\033[0m"