Update New-AzureRmRoleDefinition.md

Author: maddieclayton

src/ResourceManager/Resources/Commands.Resources/help/New-AzureRmRoleDefinition.md

@@ -39,7 +39,7 @@ The input role definition MUST contain the following properties:
 2) Description: a short description of the role that summarizes the access that the role grants.
 
 3) Actions: the set of operations to which the custom role grants access.
-Use Get-AzureRmProviderOperations to get the operation for Azure resource providers that can be secured using Azure RBAC.
+Use Get-AzureRmProviderOperation to get the operation for Azure resource providers that can be secured using Azure RBAC.
 Following are some valid operation strings:
  - "*/read" grants access to read operations of all Azure resource providers.
  - "Microsoft.Network/*/read" grants access to read operations for all resource types in the Microsoft.Network resource provider of Azure.