Update README.md

Hello !

I just add the missing link for [the UGround-V1-72B model](https://huggingface.co/osunlp/UGround-V1-72B)

README.md

@@ -21,7 +21,7 @@ UGround is a strong GUI visual grounding model trained with a simple recipe. Che
 - Initial UGround-V1: https://huggingface.co/osunlp/UGround
 - UGround-V1-2B (Qwen2-VL): https://huggingface.co/osunlp/UGround-V1-2B
 - UGround-V1-7B (Qwen2-VL): https://huggingface.co/osunlp/UGround-V1-7B
-- UGround-V1-72B (Qwen2-VL): Coming Soon
+- UGround-V1-72B (Qwen2-VL): https://huggingface.co/osunlp/UGround-V1-72B
 - UGround-V1.1-2B (Qwen2-VL): Coming Soon
 - UGround-V1.1-7B (Qwen2-VL): Coming Soon
 - UGround-V1.1-72B (Qwen2-VL): Coming Soon