Adding Roadmap link to the footer

app/templates/admin_template.html

@@ -96,6 +96,7 @@
             <li><a href="{{ url_for("main.pricing") }}">Pricing</a></li>
             <li><a href="{{ url_for("main.delivery_and_failure") }}">Delivery and failure</a></li>
             <li><a href="https://www.gov.uk/performance/govuk-notify">Performance</a></li>
+            <li><a href="{{ url_for("main.roadmap") }}">Roadmap</a></li>
           </ul>
         </div>
         <div class="column-one-third">