Fixed typo

Author: eltronix

public/docs/ts/latest/guide/animations.jade

@@ -57,7 +57,7 @@ figure
 :marked
   With these we can now define an *animation trigger* called `heroState` in the component
   metadata. It has animated transitions between two states: `active` and `inactive`. When a
-  hero is active, we display a the element in slightly larger size and lighter color.
+  hero is active, we display the element in a slightly larger size and lighter color.
 
 +makeExample('animations/ts/app/hero-list-basic.component.ts', 'animationdef')(format=".")