Update cluster up price information

(cherry picked from commit 4a690de)

Author: deliahu

cli/cmd/lib_cluster_config.go

@@ -226,9 +226,9 @@ func confirmInstallClusterConfig(clusterConfig *clusterconfig.Config, awsClient
 		rows = append(rows, []interface{}{workerInstanceStr, workerPriceStr})
 	}
 
-	operatorNodeGroupPrice := operatorInstancePrice + operatorEBSPrice
+	operatorNodeGroupPrice := 2 * (operatorInstancePrice + operatorEBSPrice)
 	prometheusNodeGroupPrice := prometheusInstancePrice + prometheusEBSPrice + metricsEBSPrice
-	rows = append(rows, []interface{}{"1 t3.medium instance (cortex system)", s.DollarsAndTenthsOfCents(operatorNodeGroupPrice)})
+	rows = append(rows, []interface{}{"2 t3.medium instances (cortex system)", s.DollarsAndTenthsOfCents(operatorNodeGroupPrice)})
 	rows = append(rows, []interface{}{fmt.Sprintf("1 %s instance (prometheus)", clusterConfig.PrometheusInstanceType), s.DollarsAndTenthsOfCents(prometheusNodeGroupPrice)})
 	rows = append(rows, []interface{}{"2 network load balancers", s.DollarsMaxPrecision(nlbPrice) + " each"})