OSDOCS-9505 updated create cluster command

Author: xJustin

modules/rosa-hcp-sts-creating-a-cluster-cli.adoc

@@ -52,11 +52,11 @@ $ rosa create cluster --private --cluster-name=<cluster_name> \
     --sts --mode=auto --hosted-cp --subnet-ids=<private-subnet-id>
 ----
 
-** If you used variables like `OIDC_ID` and `SUBNET_IDS`, you can use those references when creating your cluster. For example, run the following command:
+** If you used the `OIDC_ID`, `SUBNET_IDS`, and `OPERATOR_ROLES_PREFIX` variables to prepare your environment, you can continue to use those variables when creating your cluster. For example, run the following command:
 +
 [source,terminal]
 ----
-$ rosa create cluster --hosted-cp --subnet-ids=$SUBNET_IDS --oidc-config-id=$OIDC_ID --cluster-name=<cluster_name>
+$ rosa create cluster --hosted-cp --subnet-ids=$SUBNET_IDS --oidc-config-id=$OIDC_ID --cluster-name=<cluster_name> --operator-roles-prefix=$OPERATOR_ROLES_PREFIX
 ----
 
 . Check the status of your cluster by running the following command: