bug: (#7586 followup) fix config of CODE_MAX_STRING_LENGTH (#7683)

api/core/workflow/nodes/code/code_node.py

@@ -88,9 +88,9 @@ class CodeNode(BaseNode):
             else:
                 raise ValueError(f"Output variable `{variable}` must be a string")
         
-        if len(value) > dify_config.CODE_MAX_STRING_ARRAY_LENGTH:
+        if len(value) > dify_config.CODE_MAX_STRING_LENGTH:
             raise ValueError(f'The length of output variable `{variable}` must be'
-                             f' less than {dify_config.CODE_MAX_STRING_ARRAY_LENGTH} characters')
+                             f' less than {dify_config.CODE_MAX_STRING_LENGTH} characters')
 
         return value.replace('\x00', '')