fix: 更新API文档链接至新的Swagger地址以确保准确性

docs/en/guide/api.md

@@ -1,4 +1,4 @@
 # API Reference
 
-Official: [https://docs.lm.cedar-v.com/api/](https://docs.lm.cedar-v.com/api/)
+Official: [http://lm.cedar-v.com:18888/swagger/index.html](http://lm.cedar-v.com:18888/swagger/index.html)
 Local deployment: [http://localhost:18888/swagger/index.html](http://localhost:18888/swagger/index.html)