Fixup: pass arguments to transfromTail method in DataStream interaction workflow

bt5/erp5_wendelin/WorkflowTemplateItem/portal_workflow/data_stream_interaction_workflow/scripts/DataStream_appendData.xml

@@ -54,7 +54,7 @@
   Handle appended data chunks.\n
 """\n
 data_stream = state_change[\'object\']\n
-argument_list = state_change['kwargs']['workflow_method_args']\n
+argument_list = state_change[\'kwargs\'][\'workflow_method_args\']\n
 \n
 # call you own script to handle newly appended data which \n
 # is not processed yet\n