Update install-software.md

Updating to reflect the user assigned managed identity feature

Author: kalyaninamuduri

articles/center-sap-solutions/install-software.md

@@ -21,7 +21,7 @@ In this how-to guide, you'll learn how to upload and install all the required co
 
 - An Azure subscription.
 - An Azure account with **Contributor** role access to the subscriptions and resource groups in which the VIS exists.
-- Grant the ACSS application **Azure SAP Workloads Management**, **Storage Blob Data Reader** and **Reader and Data Access** roles on the Storage Account which has the SAP software. 
+- A **User-assigned managed identity** with **Storage Blob Data Reader** and **Reader and Data Access** roles on the Storage Account which has the SAP software. 
 - A [network set up for your infrastructure deployment](prepare-network.md).
 - A deployment of S/4HANA infrastructure.
 - The SSH private key for the virtual machines in the SAP system. You generated this key during the infrastructure deployment.