Remove link from CNCF announcement section (#1072)

Removed link to GitHub issue comment from announcement.

Author: aantn

docs/overrides/main.html

@@ -4,8 +4,6 @@
 <div class="md-banner">
   <div class="md-banner__inner">
     🎉 HolmesGPT is now a CNCF Sandbox Project! We're thrilled to be part of the Cloud Native Computing Foundation.
-    <a href="https://github.com/cncf/sandbox/issues/392#issuecomment-3380007501" target="_blank">Learn more about our
-      journey</a>
   </div>
 </div>
 {% endblock %}