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.

webui.sh

@@ -131,6 +131,10 @@ case "$gpu_info" in
     ;;
     *"Navi 2"*) export HSA_OVERRIDE_GFX_VERSION=10.3.0
     ;;
+    *"Navi 3"*) [[ -z "${TORCH_COMMAND}" ]] && \
+        export TORCH_COMMAND="pip install --pre torch torchvision --index-url https://download.pytorch.org/whl/nightly/rocm5.5"
+        # Navi 3 needs at least 5.5 which is only on the nightly chain
+    ;;
     *"Renoir"*) export HSA_OVERRIDE_GFX_VERSION=9.0.0
         printf "\n%s\n" "${delimiter}"
         printf "Experimental support for Renoir: make sure to have at least 4GB of VRAM and 10GB of RAM or enable cpu mode: --use-cpu all --no-half"