readme: cleanup steps should include step to delete CRD
Delete crd in cleanup steps
@@ -83,6 +83,7 @@ busy-box 1/1 Running 0 50s
# Cleanup
$ kubectl delete -f deploy/cr.yaml
+$ kubectl delete -f deploy/crd.yaml
$ kubectl delete -f deploy/operator.yaml
$ kubectl delete -f deploy/rbac.yaml
```
