Add reno

Author: seunghun1ee

releasenotes/notes/add-rabbitmq-upgrade-ci-ddb7271c83b75897.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Added a step to upgrade RabbitMQ from version 3.13 to 4.1 after queue
+    migration in ``upgrade-prerequisites.sh``.
+    Multinode upgrade CI will go through this when run with major upgrade
+    enabled.