Remove an illegal comma from JSON example
Remove an illegal comma from JSON example

JSON does not allow trailing commas after the last key in an object.
yp-engineering/marathon,meln1k/marathon,mesosphere/marathon,gsantovena/marathon,mesosphere/marathon,Caerostris/marathon,guenter/marathon,gsantovena/marathon,titosand/marathon,janisz/marathon,ss75710541/marathon,gsantovena/marathon,guenter/marathon,janisz/marathon,janisz/marathon,janisz/marathon,mesosphere/marathon,ss75710541/marathon,natemurthy/marathon,meln1k/marathon,ss75710541/marathon,meln1k/marathon,timcharper/marathon,mesosphere/marathon,Caerostris/marathon,janisz/marathon,meln1k/marathon,meln1k/marathon,Caerostris/marathon,mesosphere/marathon,guenter/marathon,gsantovena/marathon,guenter/marathon,Caerostris/marathon,gsantovena/marathon,natemurthy/marathon,yp-engineering/marathon,natemurthy/marathon,guenter/marathon,timcharper/marathon,titosand/marathon,Caerostris/marathon,timcharper/marathon