3.12.0 release notes updates

Author: michaelklishin

release-notes/3.12.0.md

@@ -1,6 +1,6 @@
-## RabbitMQ 3.12.0-rc.2
+## RabbitMQ 3.12.0-rc.3
 
-RabbitMQ `3.12.0-rc.2` is a candidate of a new feature release.
+RabbitMQ `3.12.0-rc.3` is a candidate of a new feature release.
 
 ## Highlights
 
@@ -21,10 +21,13 @@ with [Khepri](https://www.youtube.com/watch?v=huT-zmXvfuM).
 
 See Compatibility Notes below to learn about breaking or potentially breaking changes in this release.
 
-## Obtaining Packages
+## Release Artifacts
 
-RabbitMQ releases are distributed via [GitHub](https://github.com/rabbitmq/rabbitmq-server/releases), [Cloudsmith](https://cloudsmith.io/~rabbitmq/repos/),
-and [PackageCloud](https://packagecloud.io/rabbitmq).
+RabbitMQ releases are distributed via [GitHub](https://github.com/rabbitmq/rabbitmq-server/releases).
+[Debian](https://rabbitmq.com/install-debian.html) and [RPM packages](https://rabbitmq.com/install-rpm.html) are available via Cloudsmith mirrors, as well as [PackageCloud](https://packagecloud.io/rabbitmq).
+
+[Community Docker image](https://hub.docker.com/_/rabbitmq/), [Chocolatey package](https://community.chocolatey.org/packages/rabbitmq), and the [Homebrew formula](https://rabbitmq.com/install-homebrew.html)
+are other installation options. They are updated with a delay (usually a few days).
 
 
 ## Erlang/OTP Compatibility Notes
@@ -318,7 +321,13 @@ This release includes all bug fixes shipped in the `3.11.x` series.
  * **Potentially breaking** change: deprecated UAA-specific configuration keys were removed:
    `management.enable_uaa`, `management.uaa_*`.
 
-   GitHub issue: [](https://github.com/rabbitmq/rabbitmq-server/pull/7887)
+   GitHub issue: [#7887](https://github.com/rabbitmq/rabbitmq-server/pull/7887)
+
+ * Classic queues now list their storage implementation version on the details page.
+
+   Contributed by @gomoripeti (CloudAMQP)
+
+   GitHub issue: [#8244](https://github.com/rabbitmq/rabbitmq-server/pull/8244)
 
 #### Bug Fixes