chore/docs: fix rst style and typo (GH-32331)



Current:

![图片](https://user-images.githubusercontent.com/24759802/161704413-30fc91e8-ccd1-4617-8483-bc54ec970f30.png)

After this change:

![图片](https://user-images.githubusercontent.com/24759802/161704636-a5458192-a93a-40af-8bde-90ba80fdb53f.png)

Trivial so I don't think it needs news or issue

Automerge-Triggered-By: GH:JulienPalard
1 file changed