Someone bought a similar domain and copied all of the content – wdyd?

Our original domain is https://wasp-lang.dev, while the fake one is https://wasp-lang.net/. They didn't change anything, even all of the URLs remained the same. Also didn't try to get in touch with us, we discovered it by accident.

I'm not sure what is their motivation (sell us domain at a premium?), but doesn't sound benign. What can we even do in such a situation?

Thanks for your advice!