Correcting image link

Change-Id: I8c9fac950edb896698001e303ff624ee5ea70763

Author: ryan-devrel

Sidebar.html

@@ -113,7 +113,7 @@
 
     <div class="sidebar bottom">
       <img alt="Add-on logo" class="logo" width="25"
-          src="https://googledrive.com/host/0B0G1UdyJGrY6XzdjQWF4a1JYY1k/form-notifications-logo-small.png">
+          src="https://g-suite-documentation-images.firebaseapp.com/images/newFormNotificationsicon.png">
       <span class="gray branding-text">Form Notifications by Google</span>
     </div>