update README (#280)

* replace github address

* fix address

* Update requirements.txt

* Update unimol_binding_pose_demo.ipynb

* Update README.md

* Update README.md

* Update README.md

* uni-mol2 codebase

* Update README.md

* Update README.md

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Co-authored-by: dp <dp@dpdeMacBook-Pro-7.local>
Co-authored-by: dp <dp@dpdeMacBook-Pro-8.local>

Author: 3 people

README.md

@@ -69,6 +69,7 @@ Service of Uni-Mol Docking V2 is avaiable at https://bohrium.dp.tech/apps/unimol
 
 Uni-Mol2: Exploring Molecular Pretraining Model at Scale
 ==================================================================
+[![arXiv](https://img.shields.io/badge/arXiv-2406.14969-00ff00.svg)](https://arxiv.org/pdf/2406.14969)
 
 <p align="center">
     <img src="unimol2/figure/unimol2_arch.jpg" alt="overview" width="800" />