Update 3.11.12 release notes

(cherry picked from commit 213309c)

Author: michaelklishin

release-notes/3.11.12.md

@@ -40,10 +40,35 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
 
    GitHib issue: [#7677](https://github.com/rabbitmq/rabbitmq-server/pull/7677)
 
+#### Enhancements
 
-## Management Plugin
+ * When the maximum allowed number of connections to the node was limited using the `connection_max` key
+   and the limit was reached, newly connecting client previously would run into a TCP connection timeout.
 
-### Bug Fixes
+   Now a more specific error will be returned to the client before connection closure.
+
+   Contributed by @SimonUnge (AWS).
+
+   GitHub issue: [#7593](https://github.com/rabbitmq/rabbitmq-server/issues/7593)
+
+
+### CLI Tools
+
+#### Bug Fixes
+
+ * `rabbitmqctl add_vhosts` failed with an exception when `--default-queue-type` option was provided.
+
+   GitHub issue: [#7750](https://github.com/rabbitmq/rabbitmq-server/issues/7750)
+
+
+### Management Plugin
+
+#### Bug Fixes
+
+ * HTTP API endpoint `PUT /api/vhosts/{name}` incorrectly used `defaultqueuetype` for default queue type
+   key name. It is now `default_queue_type`, the same key as returned by `GET /api/vhosts/{name}`.
+
+   GitHub issue: [#7734](https://github.com/rabbitmq/rabbitmq-server/issues/7734)
 
  * HTTP API will now respond with a `405 Method Not Allowed` instead of a 500 when
    an unsupported method is used by the client.
@@ -53,6 +78,15 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
    GitHub issue: [#7675](https://github.com/rabbitmq/rabbitmq-server/pull/7675)
 
 
+### AMQP 1.0 Plugin
+
+#### Bug Fixes
+
+ * Fixed AMQP 1.0 authentication issue that affected OAuth 2 token users.
+
+   GitHub issue: [#7758](https://github.com/rabbitmq/rabbitmq-server/pull/7758)
+
+
 ## Dependency Upgrades
 
 None in this release.