Add #5312 to 3.11.4 release notes

rabbitmq · Jan 17, 2023 · e3a0304 · e3a0304
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diff --git a/release-notes/3.11.4.md b/release-notes/3.11.4.md
@@ -46,6 +46,10 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
 
    GitHub issue: [#6447](https://github.com/rabbitmq/rabbitmq-server/issues/6447)
 
+ * Dead-lettering of a large number of messages to a classic mirrored queues now has lower peak memory footprint.
+
+   GitHub issue: [#5312](https://github.com/rabbitmq/rabbitmq-server/issues/5312)
+
 #### Bug Fixes
 
  * When a node encouters an invalid `definitions.local.file` on boot,