Update release notes for #3422

#3422

Author: HoloRin

release-notes/3.9.6.md

@@ -54,6 +54,10 @@ Contributors are encouraged to update them together with their changes. This hel
 
     GitHub issue: [#3389](https://github.com/rabbitmq/rabbitmq-server/issues/3389)
 
+  * Counters have been added to the tiles of several sections on detail pages.
+
+    GitHub issue: [#3422](https://github.com/rabbitmq/rabbitmq-server/pull/3422)
+
 
 ## Dependency Upgrades