Update support link.

(cherry picked from commit f8ae3f1)

Author: MirahImage

deps/rabbitmq_management/priv/www/js/tmpl/layout.ejs

@@ -48,7 +48,7 @@
     <li><a rel="noopener noreferrer" href="https://www.rabbitmq.com/tutorials" target="_blank">Tutorials</a></li>
     <li><a rel="noopener noreferrer" href="https://www.rabbitmq.com/release-information" target="_blank">New releases</a></li>
     <li><a rel="noopener noreferrer" href="https://www.vmware.com/products/rabbitmq.html" target="_blank">Commercial edition</a></li>
-    <li><a rel="noopener noreferrer" href="https://www.rabbitmq.com/commercial-offerings" target="_blank">Commercial support</a></li>
+    <li><a rel="noopener noreferrer" href="https://www.rabbitmq.com/contact#tanzu-rabbitmq" target="_blank">Commercial support</a></li>
     <li><a rel="noopener noreferrer" href="https://github.com/rabbitmq/rabbitmq-server/discussions" target="_blank">Discussions</a></li>
     <li><a rel="noopener noreferrer" href="https://rabbitmq.com/discord/" target="_blank">Discord</a></li>
     <li><a rel="noopener noreferrer" href="https://www.rabbitmq.com/docs/plugins" target="_blank">Plugins</a></li>