fix the egress gateway example for multi cluster gateways (#4397)
fix the egress gateway example for multi cluster gateways (#4397)

* fix the egress gateway example

need to change static because one address was host the other was ip.

* update to make it cleaner

* minor typo

* minor tweaks

* fix lint

* format change

* fix lint

* fix lint

* clean up tips per frank and shriram's suggestion

* fix lint

istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io