replace depercated commands with new commands

content/en/docs/tasks/administer-cluster/declare-network-policy.md

@@ -33,7 +33,7 @@ The above list is sorted alphabetically by product name, not by recommendation o
 To see how Kubernetes network policy works, start off by creating an `nginx` deployment.
 
 ```console
-kubectl run nginx --image=nginx --replicas=2
+kubectl create deployment nginx --image=nginx
 ```
 ```none
 deployment.apps/nginx created
@@ -62,7 +62,6 @@ service/nginx               10.100.0.16   <none>        80/TCP     33s
 
 NAME                        READY         STATUS        RESTARTS   AGE
 pod/nginx-701339712-e0qfq   1/1           Running       0          35s
-pod/nginx-701339712-o00ef   1/1           Running       0          35s
 ```
 
 ## Test the service by accessing it from another pod
@@ -72,7 +71,7 @@ You should be able to access the new `nginx` service from other pods. To test, a
 Start a busybox container, and use `wget` on the `nginx` service:
 
 ```console
-kubectl run busybox --rm -ti --image=busybox /bin/sh
+kubectl run --generator=run-pod/v1 busybox --rm -it --image=busybox -- /bin/sh
 ```
 
 ```console