Version "22.04" of Ubuntu is not supported

[chrstphfrtz]

Describe the bug

While running a GitHub Action with ubuntu-22.04 the following error occurs

Run swift-actions/setup-swift@v1
[8](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:9)
Error: Unexpected error, unable to continue. Please report at https://github.com/swift-actions/setup-swift/issues
[9](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:10)
Version "22.04" of Ubuntu is not supported
[10](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:11)
Stacktrace:
[11](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:12)
Error: Version "22.04" of Ubuntu is not supported
[12](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:13)
    at Object.<anonymous> (/home/runner/work/_actions/swift-actions/setup-swift/v1/dist/index.js:9091:19)
[13](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:14)
    at Generator.next (<anonymous>)
[14](https://github.com/chrstphfrtz/Dolphin/runs/7598794433?check_suite_focus=true#step:3:15)
    at fulfilled (/home/runner/work/_actions/swift-actions/setup-swift/v1/dist/index.js:9044:58)

I guess this is intended as ubuntu-22.04 is in beta right now (https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources) but what I am wondering is why the check is even performed.

Looking at https://github.com/swift-actions/setup-swift/blob/main/src/os.ts the macOS system version is completely ignored as it is set to version: "latest" as soon as it detects the darwin os but the linux case specifically checks the Ubuntu version. Therefore, macos-12 works in GitHub Actions although it is not in the list.

This brings me to my question: Is the system version check for Ubuntu needed and if yes, should it then also be implemented for the macOS system version? I am more than happy to help and can open a PR if this is decided.

Workflow configuration (please complete the following information):

• Platform (runs-on): [ubuntu-22.04, macos-12]
• Swift version (swift-version): 5.6.1