Fix attribution metadata on event-basics.md

Author: ajpiano

page/events/event-basics.md

@@ -1,6 +1,7 @@
 ---
 title: jQuery Event Basics
-attribution:  jQuery Fundamentals
+attribution:
+  - jQuery Fundamentals
 level: beginner
 ---
 
@@ -233,4 +234,4 @@ function firstEvent(eventObject){
 
 In this case, the `firstEvent` function will be executed once *for each event*.  For the snippet above, this means
 that once an input element gains focus, the handler function will still execute for the first keydown event on that 
-element.
+element.