Merge pull request #2702 from nf-core/slack-join-admonition

Join: admonition for expired slack invite link

sites/main-site/src/pages/join.astro

@@ -145,6 +145,10 @@ const headings = [
             ><i class="fab fa-slack"></i> Get an invite to nf-core Slack</a
         >
     </p>
+    <div class="alert alert-secondary text-center small">
+        If the invite link doesn't work, please email us at
+        <a href="mailto:[email protected]">[email protected]</a> so that we can update it. Thanks!
+    </div>
 
     <h1 id="github" class="mt-5">
         <span class="join-pull-img bg-body"><Icon name="fa:github" class="text-body" size="120px" /></span>