Update Slack teams on my start page

www/start.html

@@ -11,12 +11,11 @@
 	<button type="submit" class="btn btn-primary">Go</button>
 </form>
 
-<h2>Web Apps</h2>
+<h2>Slack Teams</h2>
 
-<button data-url="https://zefr.slack.com/" class="app btn btn-primary">ZEFR Slack</button>
 <button data-url="https://la-engineers.slack.com/" class="app btn btn-primary">LA-Engineers Slack</button>
 <button data-url="https://botmakers.slack.com/" class="app btn btn-primary">Botmakers Slack</button>
-<button data-url="https://www.facebook.com/" class="app btn btn-primary">Facebook</button>
+<button data-url="https://socalpython.slack.com/" class="app btn btn-primary">SoCal Python Slack</button>
 
 {% endblock %}
 {% block scripts %}