VICE running instructions in the readme are not quite correct

[mjw99]

Using the stated running instructions with VICE, of:

x64sc -warp -reu -reusize 2048 -reuimage weights.reu ./release/llama2c64.prg

I am seeing:

AUTOSTART: Loading PRG file `./release/llama2c64.prg' with autostart disk image.
AUTOSTART: Error - No idea what disk image format to use.
AUTOSTART: Resetting drive 8
AUTOSTART: Error - `./release/llama2c64.prg' is not a valid file.
Error - Failed to autostart './release/llama2c64.prg'
Initiating render thread 0 shutdown
Joining render thread 0 ...
Joined render thread 0.
CART: detach main -1: type: -1 id: -1
CART: unset cart config
VIC-II: VSP Bug: safe channels are: 0. Emulation of memory corruption is disabled.

However, the following works:

x64sc -warp -reu -reusize 2048 -reuimage weights.reu  -autostartprgmode 1  ./release/llama2c64.prg