Update to latest Qwen image base 2512

[ofirkris]

The latest Qwen image base shows more natural face features compared to the current base used here, https://huggingface.co/Qwen/Qwen-Image-2512

[Feynman1999]

Thank you for your suggestion. We plan to add checkpoints trained based on Qwen-Image-2512 in the future.
The super-resolution results trained this way may appear more natural.