update gitter link
{% block footer %}
<div class="container">
<div class="row text-center">
- <h3>questions? join the <a href="https://gitter.im/binder-project/binder">chat</a>, see the <a href="https://github.com/jupyterhub/binderhub">code</a></h3>
+ <h3>questions? join the <a href="https://gitter.im/jupyterhub/binder">chat</a>, see the <a href="https://github.com/jupyterhub/binderhub">code</a></h3>
</div>
</div>
{% endblock footer %}
