Add UV_TORCH_BACKEND=auto to HF Jobs example

This ensures UV automatically selects the correct PyTorch wheel
based on the available CUDA/GPU environment during installation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

deepseek-ocr-vllm.py

@@ -476,6 +476,7 @@ if __name__ == "__main__":
         print("\n6. Running on HF Jobs:")
         print("   hf jobs uv run --flavor l4x1 \\")
         print("     -s HF_TOKEN \\")
+        print("     -e UV_TORCH_BACKEND=auto \\")
         print("     https://huggingface.co/datasets/uv-scripts/ocr/raw/main/deepseek-ocr-vllm.py \\")
         print("       your-document-dataset \\")
         print("       your-markdown-output")