replaced slack with discord

Author: anistark

_layouts/default.html

@@ -175,7 +175,7 @@
 
                     <li class="nav-item">
                         <a target="_blank" rel="noopener noreferrer" class="nav-link"
-                            href="http://bangpypers.slack.com/"><i class="fab fa-slack"></i></a>
+                            href="https://discord.gg/Tnhbqh33zd"><i class="fab fa-brands fa-discord"></i></a>
                     </li>
 
                     {% include search-lunr.html %}
@@ -256,7 +256,7 @@ <h1 class="sitetitle">{{ site.name }}</h1>
 
                         <li class="nav-item" style="display:inline; margin: 2em;">
                             <a target="_blank" rel="noopener noreferrer" 
-                                href="http://bangpypers.slack.com/"><i class="fab fa-slack"></i></a>
+                                href="https://discord.gg/Tnhbqh33zd"><i class="fab fa-brands fa-discord"></i></a>
                         </li>
 
                     </ul>

about.md

@@ -15,5 +15,5 @@ The group maintains a <a target="_blank" rel="noopener noreferrer" href="http://
 <a target="_blank" rel="noopener noreferrer" href="http://mail.python.org/mailman/listinfo/bangpypers">Join our mailing list</a> | <a target="_blank" rel="noopener noreferrer" href="https://meetup.com/BangPypers/">Visit our meetup page</a> | <a target="_blank" rel="noopener noreferrer" href="https://bangpypers.slack.com/">Join us on Slack</a>
 </p>
 <p>
-If you need a Slack invite, <a target="_blank" rel="noopener noreferrer" href="https://join.slack.com/t/bangpypers/shared_invite/zt-84wr9lom-RKtc~mw9eHdvw~8_YPaKQg">click here.</a>
+<a target="_blank" rel="noopener noreferrer" href="https://discord.gg/Tnhbqh33zd">Join us on Discord here.</a>
 </p>