[skip-ci] Additional Prometheus-related release notes

Author: mkuratczyk

release-notes/4.1.0.md

@@ -408,6 +408,21 @@ This section can be incomplete and will be expanded as 4.1 approaches its releas
    GitHub issue: [#12765](https://github.com/rabbitmq/rabbitmq-server/pull/12765)
 
 
+ * `queue_identity_info` metric is now available
+
+   `queue_identity_info` metric is exposed, with labels describing the type
+   of the queue and its membership status (leader/follower) on the scraped node.
+
+   GitHub issue: [#13583](https://github.com/rabbitmq/rabbitmq-server/pull/13583)
+
+ * `rabbitmq_identity_info` now contains `rabbitmq_endpoint` label
+
+   `rabbitmq_identity_info` metric has an additional label that allows to differntiate between
+   metrics scraped from different RabbitMQ endpoints. Some metric names are the same
+   when scraped from `/metrics` and `/metrics/per-object`, which can lead to duplicates.
+
+   GitHub issue: [#13218](https://github.com/rabbitmq/rabbitmq-server/pull/13218)
+
 ### Grafana Dashboards
 
 #### Bug Fixes