fixing a typo

[taey16]

@kimhc6028 , Thanks for your well programmed repo.

I think following line of code should be modified. It just seems a typo. https://github.com/kimhc6028/pathnet-pytorch/blob/master/pathnet.py#L94

y = F.relu(self.fc3[path[1][0]](x)) --> y = F.relu(self.fc3[path[2][0]](x))

[kimhc6028]

yes, right. Thank you for finding it!