Merge pull request #4870 from rabbitmq/mergify/bp/v3.10.x/pr-4869

Update 3.10.2 release notes (backport #4869)

Author: michaelklishin

release-notes/3.10.2.md

@@ -32,6 +32,11 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
 
    GitHub issue: [#4801](https://github.com/rabbitmq/rabbitmq-server/pull/4801)
 
+ * Reduced filesystem I/O contention for workloads where a large number of classic
+   queues v2 (CQv2) were concurrently deleted.
+
+   GitHub issue: [#4844](https://github.com/rabbitmq/rabbitmq-server/pull/4844)
+
 #### Bug Fixes
 
  * Default log level used a four-character severity abbreviation instead of more