* Bump to actions/checkout v6 everywhere
* Add a note about security
* Not persisting credentials is still valuable
* Fix bad indentation
* Improve wording, remove link to PyPA guides
Co-Authored-By: Joe Rickerby <1244307+joerick@users.noreply.github.com>
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Co-authored-by: Joe Rickerby <1244307+joerick@users.noreply.github.com>