Fix GPU-less CPU use on Linux with specific Torch indexes

speedrun.sh

@@ -23,7 +23,7 @@ command -v uv &> /dev/null || curl -LsSf https://astral.sh/uv/install.sh | sh
 # create a .venv local virtual environment (if it doesn't exist)
 [ -d ".venv" ] || uv venv
 # install the repo dependencies
-uv sync
+uv sync --extra gpu
 # activate venv so that `python` uses the project's venv instead of system python
 source .venv/bin/activate