update notification-manager version 2.11.0 -> 2.11.1

vorgang-manager-server/pom.xml

@@ -57,7 +57,7 @@
 		<processor-manager.version>0.4.1</processor-manager.version>
 		<nachrichten-manager.version>2.12.0</nachrichten-manager.version>
 		<ozgcloud-starter.version>0.12.0</ozgcloud-starter.version>
-		<notification-manager.version>2.11.0</notification-manager.version>
+		<notification-manager.version>2.11.1</notification-manager.version>
 		<collaboration-manager.version>0.3.0</collaboration-manager.version>
 
 		<zip.version>2.11.1</zip.version>