Set correct item title attribute for holidays

aleksis/core/frontend/components/holiday/HolidayInlineList.vue

@@ -14,6 +14,7 @@ import DateField from "../generic/forms/DateField.vue";
     :gql-delete-mutation="gqlDeleteMutation"
     :gql-delete-multiple-mutation="gqlDeleteMultipleMutation"
     :default-item="defaultItem"
+    item-title-attribute="holidayName"
     ref="crudList"
   >
     <template #holidayName.field="{ attrs, on, isCreate }">