[ci skip] Fix a typo in Rakefile.
[ci skip] Fix a typo in Rakefile.

wenderjean/bundler,cstrahan/bundler,cdwort/bundler,patvice/bundler,ximus/bundler,agis-/bundler,ligi/bundler,TimMoore/bundler,zhangkuaiji/bundler,Wirachmat/bundler,haonature/bundler,PG-kura/bundler,h4ck3rm1k3/bundler,wenderjean/bundler,chef/bundler,JuanitoFatas/bundler,joshsoftware/bundler,kohgpat/bundler,gregkare/bundler,ipmobiletech/bundler,cstrahan/bundler,danimashu/bundler,anil826/bundler,tgxworld/bundler,robinboening/bundler,pjump/bundler,neslom/bundler,asymmetric/bundler,PG-kura/bundler,Elffers/bundler,asymmetric/bundler,EthanK28/bundler,TimMoore/bundler,lmtim/bundler,joshsoftware/bundler,davydovanton/bundler,AiyionPrime/bundler,anil826/bundler,EasonYi/bundler,Eric-Guo/bundler,haonature888/bundler,e2/bundler,CorainChicago/bundler,philnash/bundler,Wirachmat/bundler,jasonkarns/bundler,seanlinsley/bundler,danimashu/bundler,chulkilee/bundler,chef/bundler,RochesterinNYC/bundler,asutoshpalai/bundler,jaym/bundler,roseweixel/bundler,steved/bundler,twcctz500000/bundler,masarakki/bundler,ximus/bundler,haonaturel/bundler,christer155/bundler,jingweno/bundler,ipmobiletech/bundler,EthanK28/bundler,roseweixel/bundler,ngpestelos/bundler,jaym/bundler,christer155/bundler,suhastech/bundler,mattbrictson/bundler-1,AiyionPrime/bundler,pivotal-cf-experimental/bundler,zhangkuaiji/bundler,patvice/bundler,EasonYi/bundler,sideci-sample/sideci-sample-bundler,frsyuki/bundler,Teino1978-Corp/Teino1978-Corp-bundler,frsyuki/bundler,dilumnavanjana/bundler,suhastech/bundler,cdwort/bundler,haocafes/bundler,ligi/bundler,schaary/bundler,pivotal-cf-experimental/bundler,nju520/bundler,schaary/bundler,philnash/bundler,mpapis/bundler,smlance/bundler,neslom/bundler,bundler/bundler,Eric-Guo/bundler,robinboening/bundler,carpodaster/bundler,RochesterinNYC/bundler,ngpestelos/bundler,lmtim/bundler,simplybusiness/bundler,asutoshpalai/bundler,mvz/bundler,h4ck3rm1k3/bundler,byroot/bundler,mdorrance/bundler,seanlinsley/bundler,CorainChicago/bundler,davydovanton/bundler,byroot/bundler,mattbrictson/bundler-1,bronzdoc/bundler,dilumnavanjana/bundler,bundler/bundler,kohgpat/bundler,bronzdoc/bundler,pjump/bundler,Elffers/bundler,smlance/bundler,mdorrance/bundler,tgxworld/bundler,jasonkarns/bundler,masarakki/bundler,carpodaster/bundler,Teino1978-Corp/Teino1978-Corp-bundler,vemmaverve/bundler,gregkare/bundler,mvz/bundler,steved/bundler,simplybusiness/bundler,mpapis/bundler,sideci-sample/sideci-sample-bundler,elovelan/bundler,agis-/bundler,elovelan/bundler,chulkilee/bundler,nju520/bundler,jingweno/bundler