WEBUI.SH Navi 3 Support

Navi 3 card now defaults to nightly torch to utilize rocm 5.5
for out-of-the-box support.

https://download.pytorch.org/whl/nightly/

While its not yet on the main pytorch "get started" site,
it still seems perfectly indexable via pip which is all we need.

With this I'm able to clone a fresh repo and immediately run ./webui.sh
on my 7900 XTX without any problems.