Fix broken "Configuration" link

[dgjustice]

Addresses #807
I ran across this myself when reading through the tutorials last week. I think this fixes it, but I am running into docs issues. It looks like make sphinx is a WIP. While I'm on the docs subject, make start_dev_env mentioned in "Contributing" doesn't exist in the Makefile on main, either. I'm happy to address that here or on other PR.

poetry run sphinx-build -W -b html -d docs/_build/doctrees docs docs/_build/html
Skipping virtualenv creation, as specified in config file.
Running Sphinx v4.5.0
making output directory... done

Warning, treated as error:
The app.add_stylesheet() is deprecated. Please use app.add_css_file() instead.

[dbarrosop]

Thanks!