chore: update minimum python version

[andrueastman]

Partial of microsoft/kiota-python#349

[learn-build-service-prod]

Learn Build status updates of commit b2fd1b3:

✅ Validation status: passed

File	Status	Preview URL	Details
OpenAPI/kiota/quickstarts/python.md	✅Succeeded
OpenAPI/kiota/tutorials/python-azure.md	✅Succeeded

For more details, please refer to the build report.

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[baywet]

Thank you so much for not forgetting the docs!