update link to the job to permanent one

Author: lwolf

README.md

@@ -27,7 +27,7 @@ kubectl create -f https://raw.githubusercontent.com/lwolf/kube-cleanup-operator/
 kubectl logs -f $(kubectl get pods --namespace default -l "run=cleanup-operator" -o jsonpath="{.items[0].metadata.name}")
 
 # Use simple job to test it
-kubectl create -f https://raw.githubusercontent.com/kubernetes/website/master/content/en/examples/controllers/job.yaml
+kubectl create -f https://k8s.io/examples/controllers/job.yaml
 ```
 
 ## Docker images