Updated social media links

This was requested by the fundraising working group.

Author: adamzap

djangoproject/templates/includes/footer.html

@@ -47,8 +47,10 @@ <h3>Get Help</h3>
           <h3>Follow Us</h3>
           <ul>
             <li><a href="https://github.com/django">GitHub</a></li>
-            <li><a href="https://twitter.com/djangoproject">Twitter</a></li>
+            <li><a href="https://x.com/djangoproject">X</a></li>
             <li><a href="https://fosstodon.org/@django" rel="me">Fediverse (Mastodon)</a></li>
+            <li><a href="https://bsky.app/profile/djangoproject.com">Bluesky</a></li>
+            <li><a href="https://www.linkedin.com/company/django-software-foundation">LinkedIn</a></li>
             <li><a href="{% url 'weblog-feed' %}">News RSS</a></li>
           </ul>
         </div>