Add Merge Queue to custom roles (#58107)

Author: pnsk

data/reusables/organizations/additional-permissions.md

@@ -21,6 +21,13 @@ For more information, see [AUTOTITLE](/discussions).
 * Delete an issue
 * Mark an issue as a duplicate
 
+### Merge Queue
+
+* Request a solo merge
+* Jump to the front of the queue
+
+For more information, see [AUTOTITLE](/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-a-merge-queue).
+
 ### Pull Request
 
 * Close a pull request