Point to existing Trac and IRC to register vi webchat

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

src/index.html

@@ -51,7 +51,7 @@ contribute_list:
     title: "Discussions"
     excerpt: '<ul>
       <li>Join <a href="https://lists.tahoe-lafs.org/mailman/listinfo/tahoe-dev" target="_blank">the <b>tahoe-dev</b></a> mailing list</li>
-      <li>Join the <a href="https://libera.chat/" target="_blank"><b>#tahoe-lafs</b></a> channel on Libera</li>
+      <li>Join the <a href="https://web.libera.chat/#libera" target="_blank"><b>#tahoe-lafs</b></a> channel on Libera</li>
       <li>Meet us on <a href="https://meet.jit.si/AccurateFiltersManipulateBefore" target="blank"><b>Tuesday</b></a> at 17:00 UTC on Jitsi </li>
     </ul>'
   - image_path: /assets/images/collaborations.svg
@@ -66,8 +66,8 @@ contribute_list:
     alt: "issues"
     title: "Issues"
     excerpt: '<ul>
-      <li>Visit the <a href="https://forge.lafs.eval.latfa.net/tahoe-lafs/trac"><b>issue</b></a> tracker</li>
-      <li>Register an <a href="https://forge.lafs.eval.latfa.net/user/sign_up"><b>account</b></a> to interact</li>
+      <li>Visit the <a href="https://tahoe-lafs.org/trac/tahoe-lafs"><b>issue</b></a> tracker</li>
+      <li>Ask for an <b>account</b> on <a href="https://web.libera.chat/#tahoe-lafs">IRC</a> to interact</li>
     </ul>'
   - image_path: /assets/images/code.svg
     alt: "code"