minor fix in Gruntfile
minor fix in Gruntfile

hsavit1/kefir,AyaMorisawa/kefir,kelsadita/kefir,hsavit1/kefir,lautis/kefir,AgentME/kefir,AyaMorisawa/kefir,pixelpicosean/kefir,elsehow/kefir,AgentME/kefir,elsehow/kefir,kelsadita/kefir,lautis/kefir,pixelpicosean/kefir