fix a indentation from code review

Author: blueww

src/Common/Storage/Commands.Storage/Blob/Cmdlet/NewAzureStorageContainerSasToken.cs

@@ -52,7 +52,7 @@ public string Policy
         private string accessPolicyIdentifier;
 
         [Parameter(HelpMessage = "Permissions for a container. Permissions can be any not-empty subset of \"rwdl\".",
-            ParameterSetName = SasPermissionParameterSet)]
+        ParameterSetName = SasPermissionParameterSet)]
         public string Permission { get; set; }
 
         [Parameter(Mandatory = false, HelpMessage = "Protocol can be used in the request with this SAS token.")]