master

Optimize AUR commit messages for better readability

1. Replace generic $GITHUB_SHA with descriptive commit message
2. Include actual AUR version number in commit message
3. Set AUR_VERSION environment variable for reuse
4. Use clear format: 'Update git-commit-helper to {version} - Auto-published from GitHub Actions'

Before: commit message was just a commit hash like 'a58345d...'
After: commit message will be 'Update git-commit-helper to 0.6.0.r7.06b1e0c - Auto-published from GitHub Actions'

This makes AUR commit history much more readable and informative.

优化AUR提交信息以提高可读性

1. 将通用的$GITHUB_SHA替换为描述性提交信息
2. 在提交信息中包含实际的AUR版本号
3. 设置AUR_VERSION环境变量以供重用
4. 使用清晰格式：'Update git-commit-helper to {version} - Auto-published from GitHub Actions'

之前：提交信息只是一个commit hash，如'a58345d...'
之后：提交信息将是'Update git-commit-helper to 0.6.0.r7.06b1e0c - Auto-published from GitHub Actions'

这使得AUR提交历史更易读和更有信息量。