Section Navigation: Move "Using Hatch to Migrate setup.py to a pyproject.toml" to a different part of the nav

[BSuperbad]

"Using Hatch to Migrate setup.py to a pyproject.toml" needs to be moved from the Python Packaging Tutorial Setup nav section

Link: https://www.pyopensci.org/python-package-guide/tutorials/setup-py-to-pyproject-toml.html#using-hatch-to-migrate-setup-py-to-a-pyproject-toml