Add GitHub Discussions to contact

Author: Airblader

contact/index.html

@@ -7,8 +7,13 @@ <h2>Contact</h2>
 
 <p>
 If you have any questions which are not answered by the <a
-href="/docs/">Documentation</a>, please do not hesitate to contact us. The best
-way to reach us is via IRC:
+href="/docs/">Documentation</a>, please do not hesitate to contact us. You can
+reach us through any of the following channels:
+</p>
+
+<p>
+The official <a href="https://github.com/i3/i3/discussions" title="GitHub Discussions for i3">
+GitHub Discussions</a> page on GitHub for questions and answers.
 </p>
 
 <p>