Add SimpleScan to the list of frontend applications.

sane-frontends.html

@@ -147,6 +147,12 @@
         easy way.  It uses the
         <a href="https://github.com/jflesch/pyinsane">Pyinsane</a/>
         Python binding to interface with SANE (and Windows WIA API).
+
+      <li>
+        <a href="https://gitlab.gnome.org/GNOME/simple-scan">SimpleScan</a>
+	- a GNOME document scanning application.
+      </li>
+
     </ul>
 
     <h2>Graphical Frontends for Specific Devices</h2>