Consider compiling with musl or an older libc

[autarch]

It looks like the latest release was compiled against a very recent glibc on Linux, and so it doesn't run on Ubuntu 20.04. It'd be nice to support slightly older distros like this one.

I think the best option is to take advantage of Rust's easy-to-use musl support and compile with that. But alternatively, I think you could just specify ubuntu-20.04 in your GH Actions YAML instead of ubuntu-latest (which is 22.04 right now).