Updating Slack link [deploy site]

Author: diemol

site_source_files/themes/selenium/layouts/support/section.html

@@ -37,7 +37,7 @@ <h2>Chat Room and Slack</h2>
     <p>The #selenium IRC log archive is available at <a href="https://freenode.logbot.info/selenium">logbot</a>.</p>
     <p>If you prefer to use <a href="https://slack.com">Slack</a> the IRC
         channel is mirrored to Slack too. You can sign up to
-        the <a href="https://seleniumhq.slack.com/join/shared_invite/enQtODAwOTUzOTM5OTEwLTZjZjgzN2ExOTBmZGE0NjkwYzA2Nzc0MjczMGYwYjdiNGQ5YjI0ZjdjYjFhMjVlMjFkZWJmNDYyMmU1OTYyM2Y">Selenium
+        the <a href="https://join.slack.com/t/seleniumhq/shared_invite/zt-f7jwg1n7-RVw4v4sMA7Zjufira_~EVw">Selenium
             Slack channel here</a>.
     </p>