update the yaml of deployment and replicas (#7107)

* update the yaml of deployment and replicas

* update the yaml comment

docs/concepts/cluster-administration/certificates.md

@@ -16,7 +16,7 @@ manually through `easyrsa`, `openssl` or `cfssl`.
 
 1.  Download, unpack, and initialize the patched version of easyrsa3.
 
-        curl -L -O https://storage.googleapis.com/kubernetes-release/easy-rsa/easy-rsa.tar.gz
+        curl -LO https://storage.googleapis.com/kubernetes-release/easy-rsa/easy-rsa.tar.gz
         tar xzf easy-rsa.tar.gz
         cd easy-rsa-master/easyrsa3
         ./easyrsa init-pki

docs/concepts/workloads/controllers/frontend.yaml

@@ -1,4 +1,4 @@
-apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
+apiVersion: apps/v1
 kind: ReplicaSet
 metadata:
   name: frontend

docs/concepts/workloads/controllers/nginx-deployment.yaml

@@ -1,4 +1,4 @@
-apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: nginx-deployment

docs/tasks/federation/policy-engine-deployment.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   labels:

docs/tasks/federation/replicaset-example-policy.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: ReplicaSet
 metadata:
   labels: