use specific EBiSC URLs on hPSCreg
use specific EBiSC URLs on hPSCreg

The old ones might change content later,
while the specific EBiSC ones try to be
backwards compatible longer.

EMBL-EBI-GCA/ebisc_tracker_2,EMBL-EBI-GCA/ebisc_tracker_2,EMBL-EBI-GCA/ebisc_tracker_2,EMBL-EBI-GCA/ebisc_tracker_2,EMBL-EBI-GCA/ebisc_tracker_2,EMBL-EBI-GCA/ebisc_tracker_2