updated valid_examples.txt
updated valid_examples.txt

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