[datasets] switch example dataset to HGDP+1kg (#10388)
[datasets] switch example dataset to HGDP+1kg (#10388)


hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail