Update chembl_datasets.py
Update chembl_datasets.py

Small fix
miaecle/deepchem,lilleswing/deepchem,Agent007/deepchem,peastman/deepchem,rbharath/deepchem,lilleswing/deepchem,miaecle/deepchem,rbharath/deepchem,joegomes/deepchem,ktaneishi/deepchem,peastman/deepchem,deepchem/deepchem,joegomes/deepchem,Agent007/deepchem,Agent007/deepchem,lilleswing/deepchem,ktaneishi/deepchem,ktaneishi/deepchem,miaecle/deepchem,deepchem/deepchem