Fix missing filename in _reimport_poses

[guysmoilov]

To reproduce the issue, you need some datapoints annotated with pose data, and run something like the following snippet:

from dagshub.data_engine import datasources
ds = datasources.get("owner/repo", "datasource-name")
ds["cvat_annotation"].is_not_null().head(1).export_as_yolo(
    download_dir="bla",
    annotation_field="cvat_annotation",
    annotation_type="pose",
)

[kbolashev]

Thanks! Sorry for missing this