修改帮助文档

README.md

@@ -58,10 +58,14 @@ U-BOOT: https://github.com/niuyuling/u-boot
 如果选择 ArmDebian 官方 [build](https://github.com/armbian/build) 构建系统，请下载补丁文件 [blueberry.patch](https://git.aixiao.me/aixiao/Blueberry/raw/branch/master/SF/ArmDebian/blueberry.patch)  
 
 ```bash
+cd ~
 apt-get -y install git wget
-git clone --depth=1 --branch=main https://github.com/armbian/build
 wget https://git.aixiao.me/aixiao/Blueberry/raw/branch/master/SF/ArmDebian/blueberry.patch
+
+git clone  https://github.com/armbian/build
 cd build
+git checkout 901922671e845808abaebbd33d407339174df9d7
+
 git apply ../blueberry.patch # 打补丁
 ./compile.sh build BOARD=blueberry BRANCH=legacy BUILD_DESKTOP=no BUILD_MINIMAL=yes KERNEL_CONFIGURE=yes RELEASE=bookworm
 ```