4.1.0 release notes: QQ parallelism improvements is a release highlight

(cherry picked from commit 9360f67)

Author: michaelklishin

release-notes/4.1.0.md

@@ -9,6 +9,14 @@ See Compatibility Notes below to learn about **breaking or potentially breaking
 
 Some key improvements in this release are listed below.
 
+### Quorum Queue Throughput and Parallelism Improvements
+
+Quorum queue log reads are now offloaded to channels (sessions, connections).
+
+In practical terms this means improved consumer throughput, lower interference of publishers
+on queue delivery rate to consumers, and improved CPU core utilization by each quorum queue
+(assuming there are enough cores available to the node).
+
 ### Initial Support for AMQP 1.0 Filter Expressions
 
 Support for the `properties` and `appliation-properties` filters of [AMQP Filter Expressions Version 1.0 Working Draft 09](https://groups.oasis-open.org/higherlogic/ws/public/document?document_id=66227).