Add link to Ruby Central slack channel

Author: thermistor

index.html

@@ -43,7 +43,7 @@ <h2>Connect</h2>
         <strong>Mastodon:</strong> we are <a rel="me" href="https://ruby.social/@vanruby">vanruby@ruby.social</a>. Please hashtag #VanRuby when talking about anything VanRuby related - especially at our events.</p>
       <p>
         <strong>Slack:</strong>
-        We hang out in #ruby on the Vancouver Developers slack community. The invite page is down so ask someone at the meetup for an invite.
+        We have a slack channel <a href="https://join.slack.com/t/rubycentralcommunity/shared_invite/zt-2uh1lvotg-227RO9FJYT_C9RLNiA8Bng">#meetup-vanruby</a> on the new Ruby Central Community slack.
       </p>
     </div>