Updated Managing Github notifications (markdown)

Managing-Github-notifications.md

@@ -22,6 +22,6 @@ Array.prototype.forEach.call(document.querySelectorAll('.js-subscription-row'),
 });
 ```
 
-*source: https://stackoverflow.com/a/27912449*
+*source: https://stackoverflow.com/q/11043374*
 
 **Next**, go down the list and click Watch on the repos you care about.