Update README.md

Author: anfisc

exercises/ex5/README.md

@@ -46,8 +46,9 @@ The service definition specifies the service scope, i.e. the relevant entity set
 
 The service binding binds your service definition to the required protocol.
 
-> **Note: There is currently an issue with the SAPUI5 libraries that are deployed on the SAP BTP ABAP Environment Systems.** 
+> **Note: There is currently an issue with the SAPUI5 libraries that are deployed on the SAP BTP ABAP Environment Systems.**  
 > As a result the preview of the OData V4 UI binding does NOT work correctly.  
+> **Do not use the OData V4 UI binding for this exercise but the OData V2 binding**   
 > As a workaround we recommend to use the OData V2 UI Binding for this exercise instead until the patch is in place.