Update readme.md

Author: tiansongyu

readme.md

@@ -31,7 +31,8 @@
 ``` bash 
 # ubuntu
 # 安装opengl、alsa
-sudo apt install cmake mesa-common-dev libgl1-mesa-dev libglu1-mesa-dev alsa-base alsa-utils alsa-source libasound2-dev -y
+sudo apt install cmake mesa-common-dev libgl1-mesa-dev \
+libglu1-mesa-dev alsa-base alsa-utils alsa-source libasound2-dev -y
 
 ```
 ### windows