Updated documentation to mention that Async APIs now fail with TypedError<RemotingError<T>>
Updated documentation to mention that Async APIs now fail with TypedError<RemotingError<T>>

See commit dba8fe54ccb316fd6c426f18e8f3012cbe442736

ufront/ufront-mvc,kevinresol/ufront-mvc,kevinresol/ufront-mvc,ufront/ufront-mvc