style(collapse): typo in a comment

s/relaizes/realizes

Author: Foxandxss

Diff for: src/collapse/collapse.js

@@ -49,7 +49,7 @@ angular.module('ui.bootstrap.collapse', ['ui.bootstrap.transition'])
           } else {
             // CSS transitions don't work with height: auto, so we have to manually change the height to a specific value
             element.css({ height: element[0].scrollHeight + 'px' });
-            //trigger reflow so a browser relaizes that height was updated from auto to a specific value
+            //trigger reflow so a browser realizes that height was updated from auto to a specific value
             var x = element[0].offsetWidth;
 
             element.removeClass('collapse in').addClass('collapsing');