Update 3.13.0 release notes for rc.4

Author: michaelklishin

release-notes/3.13.0.md

@@ -1,6 +1,6 @@
-## RabbitMQ 3.13.0-rc.3
+## RabbitMQ 3.13.0-rc.4
 
-RabbitMQ `3.13.0-rc.3` is a candidate of a new feature release.
+RabbitMQ `3.13.0-rc.4` is a candidate of a new feature release.
 
 ## Highlights
 
@@ -361,7 +361,7 @@ This release includes all bug fixes shipped in the `3.12.x` series.
 
 ### Dependency Changes
 
- * `ra` was upgraded to [`2.7.0`](https://github.com/rabbitmq/ra/releases)
+ * `ra` was upgraded to [`2.7.1`](https://github.com/rabbitmq/ra/releases)
  * `osiris` was upgraded to [`1.6.9`](https://github.com/rabbitmq/osiris/tags)
 
 ## Source Code Archives