Merge pull request #7666 from rabbitmq/mk-update-3.12.0-beta-number

3.12.0 release notes corrections

Author: michaelklishin

release-notes/3.12.0.md

@@ -1,6 +1,6 @@
-## RabbitMQ 3.12.0-beta.1
+## RabbitMQ 3.12.0-beta.3
 
-RabbitMQ `3.12.0-beta.1` is a preview of a new feature release.
+RabbitMQ `3.12.0-beta.3` is a preview of a new feature release.
 
 ## Highlights
 
@@ -104,7 +104,7 @@ in the `3.11.x` release series.
 #### Enhancements
 
  * Quorum queues now sustain higher throughput with large backlogs. They also offer higher throughput
-   on average, and in particular when [Single Active Consumer]() is used.
+   on average, and in particular when [Single Active Consumer](https://rabbitmq.com/consumers.html#single-active-consumer) is used.
 
    GitHub issue: [#7553](https://github.com/rabbitmq/rabbitmq-server/pull/7553#issuecomment-1463660454)
 
@@ -138,7 +138,7 @@ in the `3.11.x` release series.
 
  * Initial Erlang 26 compatibility
 
-   GitHub issues: [#7443](https://github.com/rabbitmq/rabbitmq-server/pull/7443), []()
+   GitHub issues: [#7443](https://github.com/rabbitmq/rabbitmq-server/pull/7443)
 
  * There is now a way to pre-configure user permissions for newly created virtual hosts.