Indium just updated about an hour ago. However, the new build only supports Minecraft 1.20.2 and higher, leaving 1.20.1 users only 1.0.27, which is incompatible with Sodium 0.5.8.
For those who wants to use Indium 1.0.29 on Minecraft 1.20.1, here're some dependency override files.
Put it in your config folder.
fabric_loader_dependencies.json for Fabric.
quilt-loader-overrides.json for Quilt.