Update config.js
Update config.js

fix typo when trying to get the mongodb url
l4chong/newbullrush,watson-developer-cloud/your-celebrity-match,HarryAKA/twitter-watson-insights,watson-developer-cloud/your-celebrity-match,M4gn4tor/yourcelebritymatch,JakePeyser/runkeeper-hashmatch,watson-developer-cloud/yourcelebritymatch,Spatika/yourcelebritymatch,chrismoulton/yourcelebritymatch,HarryAKA/twitter-watson-insights,Spatika/yourcelebritymatch,JakePeyser/runkeeper-hashmatch,watson-developer-cloud/yourcelebritymatch,cemoulto/yourcelebritymatch,chrismoulton/yourcelebritymatch,l4chong/newbullrush,M4gn4tor/yourcelebritymatch,marge76/tweet-compare,cemoulto/yourcelebritymatch,marge76/tweet-compare