add controlnet demo link;

Signed-off-by: lawrence-cj <[email protected]>

README.md

@@ -38,7 +38,7 @@ As a result, Sana-0.6B is very competitive with modern giant diffusion models (e
 
 ## 🔥🔥 News
 
-- (🔥 New) \[2025/2/10\] 🚀Sana + ControlNet is released. [\[Guidance\]](asset/docs/sana_controlnet.md) | [\[Model\]](asset/docs/model_zoo.md)
+- (🔥 New) \[2025/2/10\] 🚀Sana + ControlNet is released. [\[Guidance\]](asset/docs/sana_controlnet.md) | [\[Model\]](asset/docs/model_zoo.md) | [\[Demo\]](https://nv-sana.mit.edu/ctrlnet/)
 - (🔥 New) \[2025/1/30\] Release CAME-8bit optimizer code. Saving more GPU memory during training. [\[How to config\]](https://github.com/NVlabs/Sana/blob/main/configs/sana_config/1024ms/Sana_1600M_img1024_CAME8bit.yaml#L86)
 - (🔥 New) \[2025/1/29\] 🎉 🎉 🎉**SANA 1.5 is out! Figure out how to do efficient training & inference scaling!** 🚀[\[Tech Report\]](https://arxiv.org/abs/2501.18427)
 - (🔥 New) \[2025/1/24\] 4bit-Sana is released, powered by [SVDQuant and Nunchaku](https://github.com/mit-han-lab/nunchaku) inference engine. Now run your Sana within **8GB** GPU VRAM [\[Guidance\]](asset/docs/4bit_sana.md) [\[Demo\]](https://svdquant.mit.edu/) [\[Model\]](asset/docs/model_zoo.md)