[General Issue] 文档中关于数据增强的方式不明确

[Liyulingyue]

README_CN.md中没有找到明确的关于transforms内容和写法的说明，希望可以补充或者提供相关介绍页面。

[haoyuying]

请参考这里：https://github.com/PaddlePaddle/PaddleSeg/blob/457af2edb51a3c85ac9fd019e564c4099b1ee8bd/docs/apis/transforms/transforms_cn.md

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.