Update Readme

Author: troettinger

Identity/README.md

@@ -57,7 +57,7 @@ $adminARMEndpoint = "https://adminmanagement.<region>.<domain>"
 $azureStackDirectoryTenant = "<homeDirectoryTenant>.onmicrosoft.com" # this is the primary tenant Azure Stack is registered to
 $guestDirectoryTenantToBeOnboarded = "<guestDirectoryTenant>.onmicrosoft.com" # this is the new tenant that needs to be onboarded to Azure Stack
 $location = "local"
-Register-GuestDirectoryTenantToAzureStack -AdminResourceManagerEndpoint $adminARMEndpoint `
+Register-AzsGuestDirectoryTenant -AdminResourceManagerEndpoint $adminARMEndpoint `
     -DirectoryTenantName $azureStackDirectoryTenant `
     -GuestDirectoryTenantName $guestDirectoryTenantToBeOnboarded `
     -Location $location
@@ -82,6 +82,6 @@ Execute the following cmdlet as the administrator of the directory that needs to
 $tenantARMEndpoint = "https://management.<region>.<domain>"
 $guestDirectoryTenantName = "<guestDirectoryTenant>.onmicrosoft.com" # this is the new tenant that needs to be onboarded to Azure Stack
 
-Register-AzureStackWithMyDirectoryTenant -TenantResourceManagerEndpoint $tenantARMEndpoint `
+Register-AzsWithMyDirectoryTenant -TenantResourceManagerEndpoint $tenantARMEndpoint `
     -DirectoryTenantName $guestDirectoryTenantName
 ```