Website claims bootstrap.build uses bootstrap v5, while this repo claims it uses v4

Hai there! 👋

On the bootstrap.build website, it claims it uses bootstrap 5, however here it claims it uses v4.0-beta2, there were many breaking changes from bootstrap 4 to 5. Why does the website misinform users? Or is there some information I am missing?

[bermanto]

I assume the new version of the website is no longer OSS. The project was acquired many years ago and I no longer own the org (https://github.com/bootstrap-build)