First install the theme we use:
pip install -r requirements.txt
Then use make to build the html:
make html
Then, make any changes to the documentation in source, do make html again, and check your changes by checking the html files in build/html (you can start by opening index.html).
If everything looks good, make a Pull Request and the documentation will update automatically once the change has landed.
If the documentation is not up to date within an hour after landing, please file an issue.