Data link changes in scripts/download.sh

[GNEHUY]

The following links are currently available

wget https://msmarco.z22.web.core.windows.net/msmarcoranking/collectionandqueries.tar.gz
wget https://msmarco.z22.web.core.windows.net/msmarcoranking/triples.train.small.tar.gz
wget https://msmarco.z22.web.core.windows.net/msmarcoranking/top1000.eval.tar.gz

[Hannibal046]

Appreciate! Already add a reference in README!