Update pytz to 2024.2

[pyup-bot]

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This PR updates pytz from 2017.3 to 2024.2.

The bot wasn't able to find a changelog for this release. Got an idea?

Links

• PyPI: https://pypi.org/project/pytz
• Homepage: http://pythonhosted.org/pytz
• Docs: https://pythonhosted.org/pytz/