An aarch64 ISO bundles node-v*-linux-arm64.tar.gz, and mise-work.sh
looked for node-v*-linux-x64.tar.gz on every machine. An offline install
on aarch64 stopped at its last step: "Error: bundled Node.js tarball
missing from /opt/packages".
The name now follows uname -m. x86_64 looks for the same file as before.
This is the change the n1x branch already carries, from Spencer Bull's
6d022e36.