Bad practice in GAN example

[MrWhatZitToYaa]

📚 Documentation

In the examples section the GAN tutorial creates instances of generator and discriminator (which are nn.Modules) inside the init function, which is bad practice according to this in the class type defaults section. I propose changing the GAN tutorial to conform to best practices.

cc @Borda

[MrWhatZitToYaa]

This was my bad, it is indeed correct after spending more time analyzing the issue.