Update discourse link to binder sub-channel
{% block footer %}
<div class="container">
<div class="row text-center">
- <h3>questions?<br />join the <a href="https://discourse.jupyter.org">discussion</a>, read the <a href="https://mybinder.readthedocs.io/en/latest/">docs</a>, see the <a href="https://github.com/jupyterhub/binderhub">code</a></h3>
+ <h3>questions?<br />join the <a href="https://discourse.jupyter.org/c/binder">discussion</a>, read the <a href="https://mybinder.readthedocs.io/en/latest/">docs</a>, see the <a href="https://github.com/jupyterhub/binderhub">code</a></h3>
</div>
</div>
{% endblock footer %}
