fix

Author: umagnus

deploy/example/blobfuse-mi/README.md

@@ -25,7 +25,7 @@ You can also use a different managed-identity for different persistent volumes (
 
 ## dynamic provisioning in an existing resource group
 
-1. Grant cluster system assigned identity and kubelet identity `Contributor` role to resource group, if mount in an existing storage account, then should also grant identities to storage account
+1. Grant cluster system assigned identity(control plane identity) `Storage Account Contributor` role to resource group, if mount in an existing storage account, then should also grant identities to storage account
 
 1. Grant kubelet identity `Storage Blob Data Owner` role to resource group to mount blob storage, if mount in an existing storage account, then should also grant identity to storage account