Fix specs for cowboy_http:language_range_ret/3
Fix specs for cowboy_http:language_range_ret/3

chef/cowboy,kivra/cowboy,hairyhum/cowboy,K2InformaticsGmbH/cowboy,callsign-core/cowboy_hybi00,lpgauth/cowboy,binarin/cowboy,LineMetrics/cowboy,dangjun625/cowboy,pap/cowboy,layerhq/cowboy,heroku/cowboy,linearregression/cowboyku,piboye/cowboy,yangchengjian/cowboy,turtleDeng/cowboy,venkateshreddy/cowboy,Reimerei/cowboy,binarin/cowboy,omusico/cowboy,bobos/ecweb,heroku/cowboy,nviennot/cowboy,unisontech/cowboy,CrankWheel/cowboy,cad627/cowboy,manastech/cowboy,manastech/cowboy,unisontech/cowboy,LineMetrics/cowboy,essen/cowboy,noname007/cowboy,essen/cowboy,ninenines/cowboy,acrispin/cowboy,imdeps/cowboy,yangchengjian/cowboy,grahamrhay/cowboy,276361270/cowboy,sile/cowboy,cad627/cowboy,callsign-core/cowboy_hybi00,odo/cowboy,heroku/cowboyku,bsmr-erlang/cowboy,ferd/cowboyku,layerhq/cowboy,rabbitmq/cowboy,lpgauth/cowboy,MSch/cowboy,rbalint/pkg-erlang-cowboy,paulperegud/cowboy,piboye/cowboy,LineMetrics/cowboy