Fix API ref links

Author: Bobholamovic

langchain-paddleocr/README.md

@@ -43,4 +43,4 @@ for doc in docs[:2]:
 
 ## 📖 Documentation
 
-For full documentation, see the [API reference](https://reference.langchain.com/python/integrations/langchain_paddleocr/). For conceptual guides, tutorials, and usage examples, see the [LangChain Docs](https://docs.langchain.com/oss/python/integrations/providers/paddleocr).
+For full documentation, see the [LangChain Docs](https://docs.langchain.com/oss/python/integrations/providers/baidu).

langchain-paddleocr/README_cn.md

@@ -44,4 +44,4 @@ for doc in docs[:2]:
 
 ## 📖 文档
 
-完整文档请参阅 [API 参考](https://reference.langchain.com/python/integrations/langchain_paddleocr/)。有关概念指南、教程和使用示例，请参阅 [LangChain 文档](https://docs.langchain.com/oss/python/integrations/providers/paddleocr)。
+完整文档请参阅 [LangChain 文档](https://docs.langchain.com/oss/python/integrations/providers/baidu)。