Simplify HF Jobs token syntax to -s HF_TOKEN

Changed from:
-e HF_TOKEN=$(python3 -c "from huggingface_hub import get_token; print(get_token())")

To:
-s HF_TOKEN

The -s flag handles secrets directly without needing shell substitution.

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

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

deepseek-ocr-vllm.py

@@ -476,7 +476,7 @@ if __name__ == "__main__":
         print("       --base-size 1024 --image-size 640 --crop-mode")
         print("\n6. Running on HF Jobs:")
         print("   hf jobs uv run --flavor l4x1 \\")
-        print("     -e HF_TOKEN=$(python3 -c \"from huggingface_hub import get_token; print(get_token())\") \\")
+        print("     -s HF_TOKEN \\")
         print("     https://huggingface.co/datasets/uv-scripts/ocr/raw/main/deepseek-ocr-vllm.py \\")
         print("       your-document-dataset \\")
         print("       your-markdown-output")