update news

NEWS.md

@@ -1,7 +1,8 @@
 # AzureRMR 2.1.0
 
 * This version adds basic support for role-based access control (RBAC) at subscription, resource group and resource level. Add and remove role assignments, and retrieve role definitions. See `?rbac` for more information.
-* Fix a bug where if the user decides not to create a caching dir when prompted by AzureAuth, AzureRMR would pop up a second prompt
+* Fix a bug where if the user decides not to create a caching dir when prompted by AzureAuth, AzureRMR would pop up a second prompt.
+* Internal refactoring to remove duplicated code.
 
 # AzureRMR 2.0.0