[Docs] Add cuDNN installation in tensorrt_plugin.md (#1711)

* Update tensorrt_plugin.md

* Update tensorrt_plugin.md

* Update tensorrt_plugin.md

* Update tensorrt_plugin.md

docs/en/deployment/tensorrt_plugin.md

@@ -75,6 +75,10 @@ pip install $TENSORRT_DIR/graphsurgeon/graphsurgeon-0.4.5-py2.py3-none-any.whl
 
 For more detailed information of installing TensorRT using tar, please refer to [Nvidia' website](https://docs.nvidia.com/deeplearning/tensorrt/archives/tensorrt-721/install-guide/index.html#installing-tar).
 
+- Install cuDNN
+
+Install cuDNN 8 following [Nvidia' website](https://docs.nvidia.com/deeplearning/cudnn/install-guide/index.html#installlinux-tar).
+
 #### Build on Linux
 
 ```bash

docs/zh_cn/deployment/tensorrt_plugin.md

@@ -75,6 +75,10 @@ pip install $TENSORRT_DIR/graphsurgeon/graphsurgeon-0.4.5-py2.py3-none-any.whl
 
 想了解更多通过tar包安装TensorRT，请访问[Nvidia' website](https://docs.nvidia.com/deeplearning/tensorrt/archives/tensorrt-721/install-guide/index.html#installing-tar).
 
+- 安装 cuDNN
+
+参考[Nvidia' website](https://docs.nvidia.com/deeplearning/cudnn/install-guide/index.html#installlinux-tar)安装 cuDNN 8。
+
 #### 在Linux上编译
 
 ```bash