DOC: Corrected url in index.rst
DOC: Corrected url in index.rst

villalonreina/dipy,samuelstjean/dipy,sinkpoint/dipy,rfdougherty/dipy,maurozucchelli/dipy,mdesco/dipy,maurozucchelli/dipy,beni55/dipy,FrancoisRheaultUS/dipy,FrancoisRheaultUS/dipy,mdesco/dipy,villalonreina/dipy,beni55/dipy,demianw/dipy,maurozucchelli/dipy,JohnGriffiths/dipy,rfdougherty/dipy,jyeatman/dipy,oesteban/dipy,demianw/dipy,Messaoud-Boudjada/dipy,StongeEtienne/dipy,StongeEtienne/dipy,oesteban/dipy,Messaoud-Boudjada/dipy,samuelstjean/dipy,matthieudumont/dipy,matthieudumont/dipy,jyeatman/dipy,samuelstjean/dipy,nilgoyyou/dipy,JohnGriffiths/dipy,sinkpoint/dipy,nilgoyyou/dipy