added imgs for data binding

Author: ostepane

ng-data-binding/index.html

@@ -121,7 +121,6 @@ <h2>Property Binding</h2>
             <div class="title-with-image">
                 <img class="reset" src="img/event-binding.png">
                 <h2>Event Binding</h2>
-                <img class="small-img" src="img/event.svg">
             </div>
             <pre class="width-100-percent"><code class="hljs html" data-trim data-noescape>
 &lt;book-entry [currentBook]="books[0]"
@@ -155,6 +154,7 @@ <h2>Event Binding</h2>
             <div class="title-with-image">
                 <img class="reset" src="img/event-binding.png">
                 <h2>Event Binding</h2>
+                <img class="small-img" src="img/event.svg">
             </div>
             <pre class="width-100-percent"><code class="hljs html" data-trim data-noescape>
 &lt;book-entry [currentBook]="books[0]"