docs(server): fix Response::set_status() documentation
docs(server): fix Response::set_status() documentation

tshepang/hyper,golddranks/hyper,hyperium/hyper,markuskobler/hyper,yazaddaruvala/hyper,yazaddaruvala/hyper,markuskobler/hyper,markuskobler/hyper,nickgonzales/hyper,golddranks/hyper,Keats/hyper,tshepang/hyper,golddranks/hyper,nickgonzales/hyper,Twey/hyper,hyperium/hyper,hyperium/hyper,Twey/hyper,Keats/hyper,nickgonzales/hyper,Twey/hyper,tshepang/hyper,Keats/hyper