3.12.12 release notes: formatting

Author: michaelklishin

release-notes/3.12.12.md

@@ -46,12 +46,12 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
 #### Enhancements
 
  * Simplified some type specs.
-   
+
    Contributed by @ariel-anieli.
 
-   [#10228](https://github.com/rabbitmq/rabbitmq-server/pull/10228)
+   GitHub issue: [#10228](https://github.com/rabbitmq/rabbitmq-server/pull/10228)
+
 
-                                                                                                            
 ### Stream Plugin
 
  * One returned error value did not match the [RabbitMQ Stream Protocol](https://github.com/rabbitmq/rabbitmq-server/blob/v3.9.x/deps/rabbitmq_stream/docs/PROTOCOL.adoc) specification.
@@ -82,10 +82,10 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
 #### Enhancements
 
  * Updated some type specs.
-   
+
    Contributed by @ariel-anieli.
 
-   [#10226](https://github.com/rabbitmq/rabbitmq-server/pull/10226)
+   GitHub issue: [#10226](https://github.com/rabbitmq/rabbitmq-server/pull/10226)
 
 
 ## Dependency Upgrades