Fix typo in contains section of README
Fix typo in contains section of README

fengyiyi/ink-1,struankl/foundation-emails,celsoyh/ink-1,celsoyh/ink-1,fengyiyi/ink-1,Smartmessages/foundation-emails,istvan-ujjmeszaros/html-email-toolset,faustgertz/sassy-ink,zurb/foundation-emails,bradbergeron-us/ink,aris-b/ink,diego3/ink,struankl/foundation-emails,Stadly/foundation-emails,struankl/foundation-emails,TomiS/sassy-ink,jsit/foundation-emails,aris-b/ink,alvaropag/ink,PeoplePerHour/ink,Stadly/foundation-emails,Stadly/foundation-emails,diego3/ink,jsit/foundation-emails,alvaropag/ink,jsit/foundation-emails,zurb/ink,faustgertz/sassy-ink,Smartmessages/foundation-emails,industrydive/sassy-ink,jsit/foundation-emails,rememberlenny/ink,zurb/ink,industrydive/sassy-ink,zurb/foundation-emails,istvan-ujjmeszaros/html-email-toolset,PeoplePerHour/ink,Stadly/foundation-emails,struankl/foundation-emails,ms425/ink,TomiS/sassy-ink,faustgertz/sassy-ink,zurb/foundation-emails,zurb/foundation-emails,industrydive/sassy-ink,TomiS/sassy-ink,bradbergeron-us/ink,arnaudgaudin/ink,arnaudgaudin/ink,ms425/ink,rememberlenny/ink