docs(guide): correct order of directive arguments within the animations chapter

Closes angular#7482

Author: Andrey Sidorov

docs/content/guide/animations.ngdoc

@@ -270,7 +270,7 @@ making calls to it when needed.
 
 ```js
 myModule.directive('my-directive', ['$animate', function($animate) {
-  return function(element, scope, attrs) {
+  return function(scope, element, attrs) {
     element.on('click', function() {
       if(element.hasClass('clicked')) {
         $animate.removeClass(element, 'clicked');