chore(deps): update dependency timezonefinder to v6.6.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
timezonefinder	6.5.7 -> 6.6.3

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Release Notes

jannikmi/timezonefinder (timezonefinder)

v6.6.3

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• when in_memory=True, all polygon numpy arrays are constructed once during startup rather than repeatedly on demand. This should significantly improve performance for applications that make frequent polygons queries.
• Created a coord_accessors.py module for abstracting access to polygon coordinates, allowing for both in-memory and file-based access.
• added auto-generated data report to the documentation. thanks to ARYAN RAJ <https://github.com/nikkhilaaryan>__ for the PR.

v6.6.2

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• hotfix missing hole_registry.json in the distributions
• added integration tests in CI/CD. Thanks to theirix <https://github.com/theirix>__

v6.5.9

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• updated the timezone boundary data to version 2025b <https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2025b>. Thanks to WestonReed <https://github.com/WestonReed>

v6.5.8

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• updated the data to 2025a <https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2025a>__
• internal: updated file_converter.py for h3>=4

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