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

[kierisi]

@all-contributors add @BSuperbad for review

[allcontributors]

@kierisi

@BSuperbad already contributed before to review

[lwasser]

this is done -- see here! i totally remember working with you (i think??) on this during the sprint!!

let me find the issue and then we can close as completed 🚀

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

[lwasser]

closing as complete via #266