feat(REQ-3340) - 调整查询是否有打印模板的逻辑

workflow-engine-server/src/main/java/cn/axzo/workflow/server/controller/web/bpmn/BpmnProcessModelController.java

@@ -366,7 +366,7 @@ public class BpmnProcessModelController implements ProcessModelApi {
                 .modelId(dto.getModelId())
                 .printFileName(config.getPrintFileName())
                 .printTemplateName(config.getPrintTemplateName())
-                .printTemplateConfig(config.getPrintTemplateConfig())
+                .printTemplateConfig(StringUtils.hasText(config.getPrintTemplateConfig()) ? config.getPrintTemplateConfig() : "")
                 .build());
         return success(true);
     }