Fix a Job example which fails the manifest validation

Author: tengqm

content/en/examples/controllers/job-success-policy.yaml

@@ -1,5 +1,7 @@
 apiVersion: batch/v1
 kind: Job
+metadata:
+  name: job-success
 spec:
   parallelism: 10
   completions: 10
@@ -23,3 +25,4 @@ spec:
               sys.exit(0)
             else:
               sys.exit(1)
+      restartPolicy: Never