correct paddle install scripts

Author: HydrogenSulfate

doc/install/easy-install.md

@@ -193,24 +193,25 @@ Switch to the TensorFlow {{ tensorflow_icon }} tab for more information.
 ::::{tab-item} CUDA 12.3
 
 ```bash
-pip install deepmd-kit[paddle]
+pip install paddlepaddle-gpu==3.0.0b2 -i https://www.paddlepaddle.org.cn/packages/stable/cu123/
+pip install deepmd-kit
 ```
 
 ::::
 
 ::::{tab-item} CUDA 11.8
 
 ```bash
-pip install paddlepaddle-gpu==3.0.0b2 -i https://www.paddlepaddle.org.cn/packages/stable/cu123/
-pip install deepmd-kit-cu11
+pip install paddlepaddle-gpu==3.0.0b2 -i https://www.paddlepaddle.org.cn/packages/stable/cu118/
+pip install deepmd-kit
 ```
 
 ::::
 
 ::::{tab-item} CPU
 
 ```bash
-pip install paddlepaddle-gpu==3.0.0b2 -i https://www.paddlepaddle.org.cn/packages/stable/cu118/
+pip install paddlepaddle==3.0.0b2 -i https://www.paddlepaddle.org.cn/packages/stable/cpu/
 pip install deepmd-kit
 ```