Update 3.9.6 release notes

(cherry picked from commit d3bae3d)

Author: michaelklishin

release-notes/3.9.6.md

@@ -18,21 +18,47 @@ Contributors are encouraged to update them together with their changes. This hel
 
 * TLS information delivered in [Proxy protocol](https://www.rabbitmq.com/networking.html#proxy-protocol) header is now attached to connection metrics as if it was provided by a non-proxying client.
 
-   GitHub issue: [#3175](https://github.com/rabbitmq/rabbitmq-server/pull/3175) contributed by @prefiks, sponsored by CloudAMQP
+  GitHub issues: [#3175](https://github.com/rabbitmq/rabbitmq-server/pull/3175), [#3371](https://github.com/rabbitmq/rabbitmq-server/pull/3371) contributed by @prefiks, sponsored by CloudAMQP
 
+ * `max_message_size` had a one-off error in the validator.
+
+   GitHub issue: [#3398](https://github.com/rabbitmq/rabbitmq-server/pull/3398)
+
+ * `mirroring_sync_batch_size` was incorrectly validated as if it represented batch size in bytes.
+   It represents batch size in number of messages, so the new default hard cap is now 1M (a very high number that's impractical)
+
+   GitHub issue: [#3398](https://github.com/rabbitmq/rabbitmq-server/pull/3398)
 
 ### Stream Plugin
 
 #### Bug Fixes
 
+ * Offset parameters were not stored correctly in some cases.
+
+   GitHub issue: [#3360](https://github.com/rabbitmq/rabbitmq-server/pull/3360), contributed by @korsmakolnikov
+
+ * Partitions list order is now stable.
+
+   GitHub issue: [#3423](https://github.com/rabbitmq/rabbitmq-server/pull/3423)
+
  * When stream clients close connections abruptly, publisher and consumer metrics get cleaned up correctly.
 
    GitHub issue: [#3340](https://github.com/rabbitmq/rabbitmq-server/pull/3340)
 
 
+### Management Plugin
+
+#### Enhancements
+
+  * Stream publishers are now listed on the individual stream page.
+
+    GitHub issue: [#3389](https://github.com/rabbitmq/rabbitmq-server/issues/3389)
+
+
 ## Dependency Upgrades
 
-No dependency changes in this release.
+ * Osiris was [upgraded to `1.2.0`](https://github.com/rabbitmq/osiris/compare/v1.1.0...v1.2.0)
+ * Ranch was [upgraded to `2.1.0`](https://github.com/ninenines/ranch/compare/2.0.0...2.1.0)
 
 
 ## Source Code Archives