Update README.md

README.md

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 # UGround (The Initial LLaVA-based Version)
 
-**Update: We have trained [stronger model](https://huggingface.co/osunlp/UGround-V1-7B) based on Qwen2-VL with the same data. We suggest using them instead for better performance and more convenient training, inference and deployment.**
+**Update: We have trained [stronger models](https://huggingface.co/osunlp/UGround-V1-7B) based on Qwen2-VL with the same data. We suggest using them instead for better performance and more convenient training, inference and deployment.**
 
 UGround is a strong GUI visual grounding model trained with a simple recipe. Check our homepage and paper for more details. This work is a collaboration between [OSUNLP](https://x.com/osunlp) and [Orby AI](https://www.orby.ai/).
 ![radar](https://osu-nlp-group.github.io/UGround/static/images/radar.png)