Update README_CN.md

Author: ai-business-hql

README_CN.md

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 #### **配置您自己的openAI模型**
 点击*按钮，配置对话模型以及工作流生成模型。
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-<img  width="50%" alt="image" src="https://github.com/user-attachments/assets/3411f48f-d597-4ad1-b45f-9819ecec2fa7" />
+<div align="center">
+    <img  width="50%" alt="image" src="https://github.com/user-attachments/assets/3411f48f-d597-4ad1-b45f-9819ecec2fa7" />
+</div>
 
 
 #### **注意**：