Change link of repojacking vulnerable link (#19393)

The link to https://github.com/vasudevgupta7/bigbird is vulnerable to repojacking (it redirects to the orignial project that changed name), you should change the link to the current name of the project. if you won't change the link, an attacker can open the linked repository and attacks users that trust your links

examples/research_projects/jax-projects/big_bird/README.md

 
-Author: [@vasudevgupta7](https://github.com/vasudevgupta7)
+Author: [@vasudevgupta7](https://github.com/thevasudevgupta/)
 
 ## Intro
 
@@ -57,4 +57,4 @@ wget https://huggingface.co/datasets/vasudevgupta/natural-questions-validation/r
 python3 evaluate.py
 ```
 
-You can find our checkpoint on HuggingFace Hub ([see this](https://huggingface.co/vasudevgupta/flax-bigbird-natural-questions)). In case you are interested in PyTorch BigBird fine-tuning, you can refer to [this repositary](https://github.com/vasudevgupta7/bigbird).
+You can find our checkpoint on HuggingFace Hub ([see this](https://huggingface.co/vasudevgupta/flax-bigbird-natural-questions)). In case you are interested in PyTorch BigBird fine-tuning, you can refer to [this repositary](https://github.com/thevasudevgupta/bigbird).