fix benchmark.rkt
fix benchmark.rkt

Gradual-Typing/Grift,akuhlens/schml,akuhlens/schml,akuhlens/schml,Gradual-Typing/Grift,Gradual-Typing/Grift,akuhlens/schml,akuhlens/schml,akuhlens/schml,Gradual-Typing/Grift