Update human-interface-guidelines.md
Update human-interface-guidelines.md

changed location of hyper-link to contractor resource
learnercys/mvp,elementary/mvp,learnercys/mvp,elementary/mvp,charanrajtc/mvp,charanrajtc/mvp,elementary/website,btkostner/mvp,charanrajtc/mvp,learnercys/mvp,elementary/website,btkostner/mvp,elementary/mvp,elementary/website,btkostner/mvp