Use apps/v1 API group whenever possible (#8055)

The use of extensions/v1beta1, apps/v1beta1 and apps/v1beta2 API
groups should be discouraged.

Closes: #8049

docs/tasks/run-application/horizontal-pod-autoscale-walkthrough.md

@@ -169,7 +169,7 @@ metadata:
   namespace: default
 spec:
   scaleTargetRef:
-    apiVersion: apps/v1beta1
+    apiVersion: apps/v1
     kind: Deployment
     name: php-apache
   minReplicas: 1
@@ -250,7 +250,7 @@ metadata:
   namespace: default
 spec:
   scaleTargetRef:
-    apiVersion: apps/v1beta1
+    apiVersion: apps/v1
     kind: Deployment
     name: php-apache
   minReplicas: 1

docs/tasks/run-application/hpa-php-apache.yaml

@@ -5,7 +5,7 @@ metadata:
   namespace: default
 spec:
   scaleTargetRef:
-    apiVersion: apps/v1beta1
+    apiVersion: apps/v1
     kind: Deployment
     name: php-apache
   minReplicas: 1

docs/tasks/run-application/rolling-update-replication-controller.md

@@ -10,9 +10,9 @@ title: Perform Rolling Update Using a Replication Controller
 ## Overview
 
 **Note**: The preferred way to create a replicated application is to use a
-[Deployment](/docs/reference/generated/kubernetes-api/{{page.version}}/#deployment-v1beta1-apps),
+[Deployment](/docs/reference/generated/kubernetes-api/{{page.version}}/#deployment-v1-apps),
 which in turn uses a
-[ReplicaSet](/docs/reference/generated/kubernetes-api/{{page.version}}/#replicaset-v1beta1-extensions).
+[ReplicaSet](/docs/reference/generated/kubernetes-api/{{page.version}}/#replicaset-v1-apps).
 For more information, see
 [Running a Stateless Application Using a Deployment](/docs/tasks/run-application/run-stateless-application-deployment/).
 {: .note}