py-virtualenv: updated to 20.17.0

v20.17.0 (2022-11-27)
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Features - 20.17.0
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- Change Nushell activation script to be a module meant to be activated as an overlay.
- Update operator used in Nushell activation script to be compatible with future versions.

Bugfixes - 20.17.0
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- Do not use deprecated API from ``importlib.resources`` on Python 3.10 or later.
- Upgrade embedded setuptools to ``65.6.3`` from ``65.5.1``

(adam)