Fix another reference to URI which would have referred to the wrong class
Fix another reference to URI which would have referred to the wrong class

Sinatra defines Sinatra::Application::URI, which is picked up when
referring to `URI` within an application.

ausaccessfed/rapidconnect,ausaccessfed/rapidconnect,ausaccessfed/rapidconnect,University-of-Auckland/rapidconnect,University-of-Auckland/rapidconnect,University-of-Auckland/rapidconnect,ausaccessfed/rapidconnect,University-of-Auckland/rapidconnect