add gitter link on the website

Author: ssurbhi560

index.html.tmpl

@@ -261,6 +261,9 @@
                           The build and upload processes take place in the feedstock, and once complete the package will be available on the conda-forge channel.</li>
                       </ul>
                     </p>
+                    <p>
+                        Please consider joining our <a href="https://gitter.im/conda-forge/conda-forge.github.io">Gitter</a> channel if you want to ask something, need help, or just want to chat with our maintainers. We would love to see you there!
+                    </p>
                 </div>
             </div>
         </div>