Merge pull request docker#10214 from traci-morrison/fix-h3-heading

Fix heading in UCP release notes

Author: traci-morrison

ee/ucp/release-notes.md

@@ -37,6 +37,7 @@ upgrade your installation to the latest release.
     firewall-cmd --permanent --zone=trusted --add-interface=docker0
     firewall-cmd --reload
     ```
+    
 ### Kubernetes
 * Enabled support for a user-managed Kubernetes KMS plugin. See [KMS plugin support for UCP](/ee/ucp/admin/configure/kms-plugin.md) for more information.