Update operator deployment instructions

The latest version of code moved the crd in original operator.yaml in its on file crd.yaml. Just deploying operator.yaml causes crash due to missing CRD.

Author: smanpathak

README.md

@@ -92,6 +92,7 @@ Deploy the Memcached Operator:
 
 ```sh
 $ kubectl create -f deploy/rbac.yaml
+$ kubectl create -f deploy/crd.yaml
 $ kubectl create -f deploy/operator.yaml
 ```