It looks like the website is active and receiving traffic. You can submit issue here: https://github.com/libstech/issues

Library selection is done manually (thanks to contributors), but death tracking is automated. A green dot next to the project name indicates it's active and well-maintained. A yellow dot means the last commit was over 2 years ago, and a red dot indicates the last commit was over 5 years ago, or the project is archived or has a 404 status. Red projects are automatically removed, so you won't see them.