Update 3.13.0 release notes

Author: michaelklishin

release-notes/3.13.0.md

@@ -18,7 +18,7 @@ The user-facing areas that have seen the biggest improvements in this release ar
  * Classic queues use version 2 of the storage implementation (CQv2).
    This should significantly improve performance of non-mirrored classic queues
 
-See Compatibility Notes below to learn about breaking or potentially breaking changes in this release.
+See Compatibility Notes below to learn about **breaking or potentially breaking changes** in this release.
 
 ## Release Artifacts
 
@@ -91,6 +91,17 @@ GET /api/queues` HTTP API endpoint has dropped several rarely used metrics, resu
 A 3.13 RabbitMQ node will fail to boot if the old configuration setting is set.
 For example, if you set `mqtt.subscription_ttl = 3600000` (1 hour) prior to 3.13, replace that setting with `mqtt.max_session_expiry_interval_seconds = 3600` (1 hour) in 3.13.
 
+### openSUSE Leap Package is not Provided
+
+An openSUSE Leap package will not be provided with this release of RabbitMQ.
+
+This release requires Erlang 26 and there is an [Erlang 26 package available](https://download.opensuse.org/repositories/devel:/languages:/erlang:/Factory/openSUSE_Factory/x86_64/) from Erlang Factory
+but the package depends on `glibc` 2.34, and all currently available openSUSE Leap releases
+(up to 15.5) ship with 2.31 at most.
+
+Team RabbitMQ would like to continue building a openSUSE Leap package when a Leap 15.5-compatible Erlang 26
+package becomes publicly available.
+
 
 ### Getting Help