Update 3.12.10.md

Author: michaelklishin

release-notes/3.12.10.md

@@ -24,7 +24,7 @@ Release notes can be found on GitHub at [rabbitmq-server/release-notes](https://
 
 ### Shovel Plugin
 
-#### Enhancements
+#### Bug Fixes
 
  * Avoids two Shovels being started after an upgrade from `3.12.6` or older versions.