slapos_erp5: drop allocation_scope/open categories

typo

master/bt5/slapos_erp5/WorkflowTemplateItem/portal_workflow/slapos_erp5_interaction_workflow/script_ComputeNode_updateAllocation.py

 compute_node = state_object["object"]
 allocation_scope = compute_node.getAllocationScope()
 
-if allocation_scope.startsWith('open'):
+if allocation_scope.startswith('open'):
   # ensure sub allocation scope are not used anymore
   assert allocation_scope == 'open', allocation_scope
   # Public compute_node capacity is handle by an alarm