Slight error in the pictorial description on tutorial page

[Adrg01]

This might not be a serious issue but I just realized that the values in the image on the pytorch tutorial page https://pytorch.org/tutorials/beginner/blitz/neural_networks_tutorial.html are wrong.

A 32x32 image would translate to a 30x30 given a 3x3 filler with stride = 1. The values are right in the code but not in the image.

[holly1238]

This issue was fixed and merged in #1257