The download link for OAG-BERT v1 in the CogDL repository is invalid.

## ❓ Questions & Help

Hello there,

I appreciate the work you all are doing. However, I have noticed that the download link for OAG-BERT v1 in the CogDL repository seems to be broken. The specific path is CogDL/cogdl/oag/oagbert.py. The current download link is https://cloud.tsinghua.edu.cn/f/051c9f87d8544698826e/?dl=1. I would be very grateful if you could update the link.

Thank you!