Update 4.0 release notes

Author: michaelklishin

release-notes/4.0.0.md

@@ -1,6 +1,6 @@
-## RabbitMQ 4.0.0-beta.2
+## RabbitMQ 4.0.0-beta.3
 
-RabbitMQ `4.0.0-beta.2` is a preview of a new major release.
+RabbitMQ `4.0.0-beta.3` is a preview of a new major release.
 
 Starting June 1st, 2024, community support for this series will only be provided to [regularly contributing users](https://github.com/rabbitmq/rabbitmq-server/blob/main/COMMUNITY_SUPPORT.md) and those who hold a valid [commercial support license](https://tanzu.vmware.com/rabbitmq/oss).
 
@@ -83,10 +83,10 @@ TBD
 
 ### Dependency Changes
 
- * Ra was [upgraded to `2.13.3`](https://github.com/rabbitmq/ra/releases)
+ * Ra was [upgraded to `2.13.5`](https://github.com/rabbitmq/ra/releases)
  * Khepri was [upgraded to `0.14.0`](https://github.com/rabbitmq/khepri/releases)
 
 ## Source Code Archives
 
-To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-4.0.0-beta.2.tar.xz`
+To obtain source code of the entire distribution, please download the archive named `rabbitmq-server-4.0.0-beta.3.tar.xz`
 instead of the source tarball produced by GitHub.