🐛 add missing element attributes

Author: rudnerbjoern

datamodels/2.x/itop-knownerror-mgmt/datamodel.itop-knownerror-mgmt.xml

@@ -247,8 +247,10 @@
         <db_key_field>link_id</db_key_field>
         <db_final_class_field/>
         <naming>
-          <attributes id="error_name"/>
-          <attributes id="functionalci_name"/>
+          <attributes>
+            <attribute id="error_name"/>
+            <attribute id="functionalci_name"/>
+          </attributes>
         </naming>
         <style>
           <icon/>