chore(examples): Stop using deprecated std::os::args in example
chore(examples): Stop using deprecated std::os::args in example

As per this compiler warning

"warning: use of deprecated item: use std::env::args() instead, #[warn(deprecated)] on by default"

manuel-woelker/hyper,huonw/hyper,steveklabnik/hyper,hannobraun/hyper,nstoddard/hyper,mre/hyper,hyperium/hyper,achanda/hyper,markuskobler/hyper,jmmaranan/hyper,mlalic/hyper,reem/hyper,mikedilger/hyper,golddranks/hyper,lame-nickname/hyper,Twey/hyper,peterhj/hyper,nickgonzales/hyper,Twey/hyper,hannobraun/hyper,pyfisch/hyper,tshepang/hyper,golddranks/hyper,mneumann/hyper,mitsuhiko/hyper,hyperium/hyper,tshepang/hyper,Keats/hyper,softprops/hyper,golddranks/hyper,yangxingpping/hyper,yazaddaruvala/hyper,fengsp/hyper,hannobraun/hyper,hyperium/hyper,mlalic/hyper,giftcards/hyper,nickgonzales/hyper,Keats/hyper,youprofit/hyper,nickgonzales/hyper,mfeckie/hyper,fhahn/hyper,bheesham/hyper,nstoddard/hyper,yazaddaruvala/hyper,fuchsnj/hyper,TimNN/hyper,Keats/hyper,clatour/hyper,tempbottle/hyper,tshepang/hyper,ianks/hyper,bonifaido/hyper,Ryman/hyper,sfackler/hyper,markuskobler/hyper,markuskobler/hyper,Twey/hyper,rschulman/hyper,erickt/hyper