Fix typos in README.jp.md
Fix typos in README.jp.md

* 'パラーメータ' / 'パラメーター' should be 'パラメータ'.
* Don't translate library name.

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