update csi-secrets-store-identity-access.md

fix azure cli syntax issue

Author: tinker1992

articles/aks/csi-secrets-store-identity-access.md

@@ -201,7 +201,7 @@ In this security model, you can grant access to your cluster's resources to team
     Alternatively, you can create a new managed identity and assign it to your virtual machine (VM) scale set or to each VM instance in your availability set using the following commands.
 
     ```azurecli-interactive
-    az identity create -resource-group <resource-group> --name <identity-name>
+    az identity create --resource-group <resource-group> --name <identity-name>
     az vmss identity assign --resource-group <resource-group> --name <agent-pool-vmss> --identities <identity-resource-id>
     az vm identity assign --resource-group <resource-group> --name <agent-pool-vm> --identities <identity-resource-id>