fix cloneset rollout docs (#1660)

docs/examples/cloneset-rollout/README.md

@@ -18,7 +18,7 @@ kubectl apply -f docs/examples/cloneset-rollout/clonesetDefinition.yaml
 
 2. Apply an application for rolling out
 ```shell
-kubectl apply -f docs/examples/cloneset-rollout/app-source.yaml
+kubectl apply -f docs/examples/cloneset-rollout/app-scale.yaml
 kubectl apply -f docs/examples/cloneset-rollout/appRollout-scale.yaml
 ```
 Check the status of the ApplicationRollout and wait for the rollout to complete.

docs/examples/cloneset-rollout/app-source.yaml

@@ -1,18 +0,0 @@
-apiVersion: core.oam.dev/v1beta1
-kind: Application
-metadata:
-  name: test-rolling
-  annotations:
-    "app.oam.dev/rollout-template": "true"
-spec:
-  components:
-    - name: metrics-provider
-      type: clonesetservice
-      properties:
-        cmd:
-          - ./podinfo
-          - stress-cpu=1
-        image: stefanprodan/podinfo:4.0.6
-        port: 8080
-        updateStrategyType: InPlaceIfPossible
-        replicas: 5