Merge pull request jupyter#621 from jupyter/krassowski-fix-wdgets-icon

Fix path to `widget.svg` on `widgets.html`

Author: palewire

widgets.html

@@ -20,7 +20,7 @@
 <section>
   <div class="section-white top-section-border">
     <div class="container">
-      <img class="section-icon img-responsive" src="assets/widget.svg" alt="icon to represent multiple notebooks">
+      <img class="section-icon img-responsive" src="assets/homepage/widget.svg" alt="icon to represent multiple notebooks">
         <h3 class="col-sm-12 section-header">Notebook Widgets</h3>
         <p class="support-paragraph">Notebooks come alive when interactive widgets are used. Users can visualize and control changes in the data. Learning becomes an immersive, plus fun, experience. Researchers can easily see how changing inputs to a model impacts the results.</p>
     </div>