Update convolution.md
Update convolution.md

In the description of VolumetricConvolution, the order of output dimensions is mistaken. Since input is `nInputPlane x time x height x width` make sense the output also is `nOutputPlane x otime x oheight x owidth` which indeed is the case and not `nOutputPlane x otime x owidth x oheight` as mistakenly posted. This can be checked e.g. by running the following code to see that the layer doesn't flip the width and height dimension orders:

require 'nn'
--make a volumetric layer
from=2
to=3
kT=1
kW=1
kH=1
m=nn.VolumetricConvolution(from,to,kT,kW,kH)
--make a tensor
d=torch.rand(from,7,11,13)
o=m:forward(d)
print(d:size(),o:size())

Cheers!
diz-vara/nn,colesbury/nn,kmul00/nn,eriche2016/nn,nicholas-leonard/nn,apaszke/nn,sagarwaghmare69/nn,joeyhng/nn