slapos_erp5: customer is only Auditor on Upgrade Decision

master/bt5/slapos_erp5/PortalTypeRolesTemplateItem/Upgrade%20Decision.xml

@@ -33,7 +33,7 @@
    <multi_property id='base_category'>source_project</multi_property>
    <multi_property id='base_category'>function</multi_property>
   </role>
-  <role id='Assignee'>
+  <role id='Auditor'>
    <property id='title'>User</property>
    <property id='description'>Monovalued role</property>
    <property id='base_category_script'>ERP5Type_getSecurityCategoryFromContent</property>