WEBUI.SH Navi 3 torch 2.1.0 rc instead of nightly

With the release candidates being out for both torch and vision,
webui should default to these over nightly for a more stable experience.

Stable release isn't excpected until October 4th:
https://dev-discuss.pytorch.org/c/release-announcements/27

webui.sh

@@ -141,9 +141,8 @@ 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/rocm5.6"
-        # Navi 3 needs at least 5.5 which is only on the nightly chain, previous versions are no longer online (torch==2.1.0.dev-20230614+rocm5.5 torchvision==0.16.0.dev-20230614+rocm5.5 torchaudio==2.1.0.dev-20230614+rocm5.5)
-        # so switch to nightly rocm5.6 without explicit versions this time
+         export TORCH_COMMAND="pip install torch torchvision --index-url https://download.pytorch.org/whl/test/rocm5.6"
+        # Navi 3 needs at least 5.5 which is only on the torch 2.1.0 release candidates right now
     ;;
     *"Renoir"*) export HSA_OVERRIDE_GFX_VERSION=9.0.0
         printf "\n%s\n" "${delimiter}"