fix README.md

README.md

@@ -27,7 +27,7 @@ torch_spline_conv whl包下载目录：[光和开发者社区](https://download.
 pip install torch* (下载torch的whl包)
 pip install fastpt* --no-deps (下载fastpt的whl包)
 source  /usr/local/bin/fastpt -E
-pip install torch_cluster* (下载的torch_cluster-fastpt的whl包)
+pip install torch_spline_conv* (下载的torch_spline_conv-fastpt的whl包)
 ```
 ### 2、使用源码编译方式安装