Fix RubyCocoa's name in the README.
Fix RubyCocoa's name in the README.

telerik/NodObjC,mralexgray/NodObjC,jerson/NodObjC,telerik/NodObjC,mralexgray/NodObjC,jerson/NodObjC,jerson/NodObjC,TooTallNate/NodObjC,TooTallNate/NodObjC