Upgrade to Ubuntu 22.04 to keep workflows running

[NoaHimesaka1873]

Ubuntu 20.04 is now gone so it's been failing. Upgrading to 22.04 will fix this.

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This change is 

[Frenzie]

It's not quite that simple. That means it wouldn't work on older versions. But it is time to switch to 22.04.

[NoaHimesaka1873]

Downgraded to 22.04 following your concern. 24.04 should come after 22.04 is gone from actions.

[Frenzie]

I just spotted a curious new thing I'm going to try to see what happens.

[Copilot]

Pull Request Overview

This PR upgrades the GitHub Actions runner from Ubuntu 20.04 to Ubuntu 22.04 to resolve workflow failures.

• Updated the "runs-on" value in the CI configuration file (.github/workflows/toolchain.yml).

[Frenzie]

This'll necessitate we upgrade all of our Docker images, too. I'm not going to do that tonight, though. :-)

[benoit-pierre]

Or we could build the toolchains in docker using our base image?

[Frenzie]

We could, but is it worth the trouble? I figure we want to move those away from 20.04 as well now that it's EOL.

[benoit-pierre]

It's still receiving security updates. The real question, is do we build our AppImage on a newer LTS (losing support for older systems).

[Frenzie]

You mean paid security updates? Unless you're nitpicking about the fact that it's still a whole month away. Anyway, if it works along these general lines it's certainly fine by me.

    container:
      image: koreader/kobase:etc

[NoaHimesaka1873]

@benoit-pierre Only until May 2025 so it's in deathbed already. For our purpose it could be treated dead already.

[benoit-pierre]

This can be closed (superseded by #52).