Update README.md

README.md

@@ -93,7 +93,7 @@ For a new language request, please refer to [Guideline for new language_requests
     - [Quick Inference Based on PIP](./doc/doc_en/whl_en.md)
     - [Python Inference](./doc/doc_en/inference_en.md)
     - [C++ Inference](./deploy/cpp_infer/readme_en.md)
-    - [Serving](./deploy/pdserving/readme_en.md)
+    - [Serving](./deploy/pdserving/README.md)
     - [Mobile](https://github.com/PaddlePaddle/PaddleOCR/blob/develop/deploy/lite/readme_en.md)
     - [Benchmark](./doc/doc_en/benchmark_en.md)  
 - Data Annotation and Synthesis