ci: add comment

Author: harry

build/build.sh

@@ -1,11 +1,10 @@
 #!/bin/bash
-# 在构建之前，先进入到项目根目录
+# go to the project root directory and execute bash `build/build.sh`
 
 set -o errexit
 set -o nounset
 set -o pipefail
 
 echo "Building..."
-# 清理并构建
 make clean && make linux
 echo "Build completed."