关于workflows配置的一些建议。

[DanielSun11]

NWPUInfectReport/.github/workflows/work.yml 中 runs-on: ubuntu-latest建议改为runs-on: ubuntu-20.04，最新版本的Ubuntu运行workflow时容易出现找不到python 3.6.7的情况。具体报错：

Run actions/setup-python@master
Version 3.6.7 was not found in the local cache
Error: Version 3.6.7 with arch x64 not found
The list of all available versions can be found here: https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json

解决措施：
[Version 3.10 with arch x64 not found](actions/setup-python#401)