Update README.md

原命令：pip install paddle-serving-server-gpu==0.4.0.trt # GPU with CUDA10.1+TensorRT

新命令：pip install paddle-serving-server-gpu==0.4.0.100 # GPU with CUDA10.1+TensorRT

README.md

@@ -49,7 +49,7 @@ pip install paddle-serving-client==0.4.0
 pip install paddle-serving-server==0.4.0 # CPU
 pip install paddle-serving-server-gpu==0.4.0.post9 # GPU with CUDA9.0
 pip install paddle-serving-server-gpu==0.4.0.post10 # GPU with CUDA10.0
-pip install paddle-serving-server-gpu==0.4.0.trt # GPU with CUDA10.1+TensorRT
+pip install paddle-serving-server-gpu==0.4.0.100 # GPU with CUDA10.1+TensorRT
 ```
 
 You may need to use a domestic mirror source (in China, you can use the Tsinghua mirror source, add `-i https://pypi.tuna.tsinghua.edu.cn/simple` to pip command) to speed up the download.