Update kubectl patch doc to use apps/v1beta2 APIs (#5422)

cn/docs/tasks/run-application/deployment-patch-demo.yaml

@@ -1,9 +1,12 @@
-apiVersion: apps/v1beta1
+apiVersion: apps/v1beta2
 kind: Deployment
 metadata:
   name: patch-demo
 spec:
   replicas: 2
+  selector:
+    matchLabels:
+      app: nginx
   template:
     metadata:
       labels:

docs/tasks/run-application/deployment-patch-demo.yaml

@@ -1,9 +1,12 @@
-apiVersion: apps/v1beta1
+apiVersion: apps/v1beta2
 kind: Deployment
 metadata:
   name: patch-demo
 spec:
   replicas: 2
+  selector:
+    matchLabels:
+      app: nginx
   template:
     metadata:
       labels:

docs/tasks/run-application/update-api-object-kubectl-patch.md

@@ -81,14 +81,14 @@ The output shows that the PodSpec in the Deployment has two Containers:
 
 ```shell
 containers:
-- image: nginx
-  imagePullPolicy: Always
-  name: patch-demo-ctr
-  ...
 - image: redis
   imagePullPolicy: Always
   name: patch-demo-ctr-2
   ...
+- image: nginx
+  imagePullPolicy: Always
+  name: patch-demo-ctr
+  ...
 ```
 
 View the Pods associated with your patched Deployment:
@@ -118,10 +118,10 @@ The output shows that the Pod has two Containers: one running nginx and one runn
 
 ```
 containers:
-- image: nginx
-  ...
 - image: redis
   ...
+- image: nginx
+  ...
 ```
 
 ### Notes on the strategic merge patch