Update azure-blob-csi.md

Author: andyzhangx

articles/aks/azure-blob-csi.md

@@ -106,7 +106,7 @@ To have a storage volume persist for your workload, you can use a StatefulSet. T
 
 ### Prerequisites
 
-- Your AKS cluster *Control plane* identity (that is, your AKS cluster name) is added to the [Contributor](../role-based-access-control/built-in-roles.md#contributor) role on the VNet and NetworkSecurityGroup.
+- Your AKS cluster *Control plane* identity (that is, your AKS cluster name) is added to the [Contributor](../role-based-access-control/built-in-roles.md#contributor) role on the VNet and network security group.
 
 1. Create a file named `azure-blob-nfs-ss.yaml` and copy in the following YAML.