docs: examples/workload-ref/workload image to dockerhub registry (argoproj#1227)

Signed-off-by: ajayk <[email protected]>

Author: ajayk

examples/workload-ref/workload-ref.yaml

@@ -14,7 +14,7 @@ spec:
     spec:
       containers:
         - name: rollouts-demo
-          image: docker.intuit.com/docker-rmt/argoproj/rollouts-demo:blue
+          image: argoproj/rollouts-demo:blue
           imagePullPolicy: Always
           ports:
             - containerPort: 8080