4.0.0-rc.1 release notes: cosmetics

(cherry picked from commit edd8fbc)

Author: michaelklishin

release-notes/4.0.0.md

@@ -1,6 +1,6 @@
 ## RabbitMQ 4.0.0-rc.1
 
-RabbitMQ `4.0.0-rc.1` is a preview of a new major release.
+RabbitMQ `4.0.0-rc.1` is a candidate 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).
@@ -50,7 +50,7 @@ Messages that are redelivered 20 times or more will be [dead-lettered](https://w
 
 This limit is necessary to protect nodes from consumers that run into infinite fail-requeue-fail-requeue loops. Such
 consumers can drive a node out of disk space by making a quorum queue Raft log grow forever without allowing compaction
-of older entries.
+of older entries to happen.
 
 If 20 deliveries per message is a common scenario for a queue, a dead-lettering target or a higher limit must be configured
 for such queues. The recommended way of doing that is via a [policy](https://www.rabbitmq.com/docs/parameters#policies).