提前踩坑了！求更新readme!

[LinHouYu]

Pull request checklist

• [ ] The PR has a proper title. Use Semantic Commit Messages. (No more branch-name title please)

• [ ] Make sure this is ready to be merged into the relevant branch. Please don't create a PR and let it hang for a few days.

• [ ] Ensure you can run the codes you submitted succesfully. These submissions will be prioritized for review:

  Introduce improvements in program execution speed;

  Introduce improvements in synthesis quality;

  Fix existing bugs reported by user feedback (or you met);

  Introduce more convenient user operations.

PR type

• Bug fix / new feature / synthesis quality improvement / program execution speed improvement

Description

• Describe what this pull request is for.
• What will it affect.

Screenshot

• Please include a screenshot if applicable

[zaki-xie]

Pytorch目前版本已要求使用Python 3.9 及以上版本安装。 若在Python 3.8版本中使用pip install torch torchvision torchaudio指令，已无法顺利安装pytorch。 可以考虑将要求的python最低版本修正为Python 3.9。

python 3.8版本下使用pip install torch torchvision torchaudio指令安装pytorch会出现报错提示未找到满足需求的pytorch版本报错：