Fixup:workflow chains on portal type and NOT its module.

bt5/erp5_mqtt/PortalTypeWorkflowChainTemplateItem/workflow_chain_type.xml

 <workflow_chain>
  <chain>
-  <type>MQTT Message Module</type>
+  <type>MQTT Message</type>
   <workflow>edit_workflow, validation_workflow</workflow>
  </chain>
 </workflow_chain>
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bt5/erp5_mqtt/bt/template_portal_type_workflow_chain_list

-MQTT Message Module | edit_workflow
-MQTT Message Module | validation_workflow
+MQTT Message | edit_workflow
+MQTT Message | validation_workflow
\ No newline at end of file