Add a relevant paper

[AndrewZhou924]

Hi Dr. Wei Jin,

Thanks for maintaining this awesome repo!

I would like to add our work (as follows) to this repo, which is quite relevant.

• Paper: On Strengthening and Defending Graph Reconstruction Attack with Markov Chain Approximation
• PDF: https://arxiv.org/pdf/2306.09104.pdf
• Code: https://github.com/tmlr-group/MC-GRA

Thanks for your attention.

Best Regards, Zhanke