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Description
At the moment this action supports only Ubuntu, which is used on GitHub hosted runners. Not sure about Debian.
AFAIU, in context of self-hosted runners a GitHub Actions runner may be run not only on Ubuntu, but on another Linux distribution. We have apt / yum repositories for Debian, Ubuntu, CentOS, Fedora, openSUSE. It looks worthful to support installing from them.
Please, highliht your interest if you would use this action on self-hosted non-Ubuntu runners or have a problem on self-hosted Ubuntu runners (add an emoji or a comment with your wishes).