Update images for ESXi section of manual
The images in the ESXi section are out of date, so I created new ones. The one for the FreeNAS OS disk size is especially confusing since the text says 8 GB which refers to the image that only shows 4GB. I also changed the data disk to 20GB, to avoid confusion.
I also added an image for the network adapter selection, in case you want to add that.