emqx/feat-11138.en.md at fix-docker-image-name-r51

Change k8s api_server default value from http://127.0.0.1:9091 to https://kubernetes.default.svc:443
emqx_ctl conf show cluster no longer displays irrelevant configuration items, such as when discovery_strategy=static, it will not display configuration information related to etcd/k8s/dns.
Remove zones(deprecated config key) from emqx_ctl conf show_keys