Update using-examples.md
Update using-examples.md

fix link to canjs_require
rjgotten/canjs,bitovi/canjs,gsmeets/canjs,rjgotten/canjs,patrick-steele-idem/canjs,rasjani/canjs,Psykoral/canjs,Psykoral/canjs,whitecolor/canjs,Psykoral/canjs,beno/canjs,tracer99/canjs,bitovi/canjs,bitovi/canjs,tracer99/canjs,gsmeets/canjs,tracer99/canjs,beno/canjs,whitecolor/canjs,bitovi/canjs,rjgotten/canjs,patrick-steele-idem/canjs,rasjani/canjs,gsmeets/canjs,whitecolor/canjs,rasjani/canjs,rjgotten/canjs,beno/canjs,rasjani/canjs,patrick-steele-idem/canjs,Psykoral/canjs