Containers based Overcloud Deployment in tripleo-quickstart "unrecognized arguments: --output-env-file"

Description
===========
Referring to document [1], I noticed the argument (--output-env-file) is not working, it is working with the parameter "--env-file". Kindly update update the document with correct syntax.

[1] https://docs.openstack.org/tripleo-docs/latest/install/containers_deployment/overcloud.html

Steps to reproduce
==================
openstack overcloud container image prepare --namespace tripleoupstream --prefix centos-binary --tag pike --output-env-file /home/stack/docker_registry.yaml
usage: openstack overcloud container image prepare [-h]
                                                   [--template-file <yaml template file>]
                                                   [--pull-source <location>]
                                                   [--push-destination <location>]
                                                   [--tag <tag>]
                                                   [--namespace <namespace>]
                                                   [--prefix <prefix>]
                                                   [--suffix <suffix>]
                                                   [--set <variable=value>]
                                                   [--exclude <regex>]
                                                   [--images-file <file path>]
                                                   [--service-environment-file <file path>]
                                                   [--env-file <file path>]
                                                   [--roles-file ROLES_FILE]
openstack overcloud container image prepare: error: unrecognized arguments: --output-env-file /home/stack/docker_registry.yaml

Expected result
===============

openstack overcloud container image prepare --namespace tripleoupstream --prefix centos-binary --tag pike --env-file /home/stack/docker_registry.yaml

Environment
===========
Tripleo Quickstart