fix Sinatra as middleware example in Spanish readme
fix Sinatra as middleware example in Spanish readme

Callygraphy/morrissey,sethuster/sinatra,JonRowe/sinatra,siberianbear/sinatra,nicoayala/sinatra,davydovanton/sinatra,ABaldwinHunter/sinatra-classic,bmizerany/sinatra,dariubs/sinatra,howtolearntocode/sinatra,guidohcosta/sinatra,emiliocorpus/sinatra,lastcat/sinatra,sethuster/sinatra,nicoayala/sinatra,kyontan/sinatra,siberianbear/sinatra,ganmacs/sinatra,eileencodes/sinatra,DoraALin/sinatra,JonMidhir/sinatra,defsprite/sinatra,cyberid41/sinatra,ganmacs/sinatra,porras/sinatra,midorineko/sinatra,kyontan/sinatra,burningTyger/sinatra,gferguson-gd/sinatra,sinatra/sinatra,nju520/sinatra,nju520/sinatra,laplaceliu/sinatra,mwpastore/sinatra,jkowens/sinatra,ksw2599/sinatra,wzheng1/sinatra,mwpastore/sinatra,QLGu/sinatra,ryanshaw/sinatra,miyazawatomoka/sinatra,dariubs/sinatra,ktw1222/sinatra,Rayheng/sinatra,burningTyger/sinatra,d-bot/sinatra,autopp/sinatra,ktw1222/sinatra,JonMidhir/sinatra,gferguson-gd/sinatra,miyazawatomoka/sinatra,jkowens/sinatra,Rayheng/sinatra,frechei/sinatra,autopp/sinatra,DoraALin/sinatra,jenalgit/sinatra,ABaldwinHunter/sinatra-classic,sinatra/sinatra,twanies/sinatra,blambeau/sinatra,kumji/sinatra,kgrz/sinatra,d-bot/sinatra,frechei/sinatra,twanies/sinatra,JonMidhir/sinatra,lastcat/sinatra,Wirachmat/sinatra,cyberid41/sinatra,Wirachmat/sinatra,QLGu/sinatra,kumji/sinatra,laplaceliu/sinatra,jkowens/sinatra,ryanshaw/sinatra,emiliocorpus/sinatra,ksw2599/sinatra,RosenDimov/sinatra,wzheng1/sinatra,jenalgit/sinatra,porras/sinatra,trexnix/sinatra,mwpastore/sinatra,eileencodes/sinatra,RosenDimov/sinatra,trexnix/sinatra,howtolearntocode/sinatra,midorineko/sinatra,JonRowe/sinatra,davydovanton/sinatra,marocchino/sinatra,defsprite/sinatra,burningTyger/sinatra,guidohcosta/sinatra