Fix warning spam caused by geopandas update

[irm-codebase]

Fixes spam caused by geopandas (op was replaced with predicate). Found while debugging something else.

See: https://geopandas.org/en/stable/docs/reference/api/geopandas.sjoin.html

Checklist

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• [ ] CHANGELOG updated
• [x] Minimal workflow tests pass
• [ ] Tests added to cover contribution
• [ ] Documentation updated
• [ ] Configuration schema updated