Merge pull request #543 from hpehl/conference-chat

[WildFly conference] Add a note about subscribing to the WildFly channel

_layouts/conference.html

@@ -28,7 +28,8 @@ <h2>What you need to know</h2>
     <h2>What you can expect</h2>
     <p>The conference includes four sessions with topics for both beginners and advanced WildFly users. There will
       be an opening and closing ceremony and a 15-minute break between the second and third session. We want all
-      sessions to be interactive, and you can ask questions at any time. Remember this is a conference for you -
+      sessions to be interactive, and you can ask questions at any time. Please subscribe to the
+      <a href="https://www.youtube.com/@WildFlyAS" target="_blank">WildFly channel</a> in advance, if you want to take part in the chat.<br/>Remember this is a conference for you -
       the WildFly community!</p>
 
     <div class="admonitionblock note" style="margin-bottom: 2rem">