3.13.1 release notes: cosmetics

(cherry picked from commit 8539806)

Author: michaelklishin

release-notes/3.13.1.md

@@ -17,8 +17,7 @@ As of 3.13.0, RabbitMQ requires Erlang 26. Nodes **will fail to start** on older
 
 Users upgrading from 3.12.x (or older releases) on Erlang 25 to 3.13.x on Erlang 26
 (both RabbitMQ *and* Erlang are upgraded at the same time) **must** consult
-the [v3.12.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.12.0) and
-[v3.13.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.13.0) first.
+the [v3.12.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.12.0) and [v3.13.0 release notes](https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.13.0) first.
 
 
 ## Changes Worth Mentioning