(DOCSP-26221) Update to multi cluster syntax in 1.17.1 (#1118)

Author: JuliaMongo

source/includes/steps-multi-cluster-source.yaml

@@ -41,6 +41,7 @@ content: |
 
         cd tools/multicluster
         go run main.go \
+        setup
           -central-cluster="${MDB_CENTRAL_CLUSTER_FULL_NAME}" \
           -member-clusters="${MDB_CLUSTER_1_FULL_NAME},${MDB_CLUSTER_2_FULL_NAME},${MDB_CLUSTER_3_FULL_NAME}" \
           -member-cluster-namespace="mongodb" \