a small fix in the delete all pods (#16824)

There was a typo in kubectl -n my-ns delete pod,svc --all

content/en/docs/reference/kubectl/cheatsheet.md

@@ -273,7 +273,7 @@ kubectl scale --replicas=5 rc/foo rc/bar rc/baz                   # Scale multip
 kubectl delete -f ./pod.json                                              # Delete a pod using the type and name specified in pod.json
 kubectl delete pod,service baz foo                                        # Delete pods and services with same names "baz" and "foo"
 kubectl delete pods,services -l name=myLabel                              # Delete pods and services with label name=myLabel
-kubectl -n my-ns delete po,svc --all                                      # Delete all pods and services in namespace my-ns,
+kubectl -n my-ns delete pod,svc --all                                      # Delete all pods and services in namespace my-ns,
 # Delete all pods matching the awk pattern1 or pattern2
 kubectl get pods  -n mynamespace --no-headers=true | awk '/pattern1|pattern2/{print $1}' | xargs  kubectl delete -n mynamespace pod
 ```