Update ErrorTypes.md to represent response in .underlying case
Update ErrorTypes.md to represent response in .underlying case

Moya/Moya,ashfurrow/Moya,justinmakaila/Moya,justinmakaila/Moya,calt/Moya,Moya/Moya,ashfurrow/Moya,calt/Moya,justinmakaila/Moya,Moya/Moya,calt/Moya