Swift 5.8 isn't available on Windows

[wadetregaskis]

Describe the bug
"Version "5.8" is not available"

https://github.com/wadetregaskis/FoundationExtensions/actions/runs/4842921516/jobs/8630176019#step:2:5

Workflow configuration (please complete the following information):

• Action version (uses): swift-actions/setup-swift@v1
• Platform (runs-on): windows-latest
• Swift version (swift-version): 5.8

[kassane]

Same error on 5.9:

https://github.com/kassane/CxxInterop-tests/actions/runs/7087742018/job/19288682450#step:4:5

Run swift-actions/setup-swift@v1.25.0
Error: Unexpected error, unable to continue. Please report at https://github.com/swift-actions/setup-swift/issues
Version "5.9" is not available
Stacktrace:
Error: Version "5.9" is not available
    at Object.verify (D:\a\_actions\swift-actions\setup-swift\v1.25.0\dist\index.js:648:15)
    at D:\a\_actions\swift-actions\setup-swift\v1.25.0\dist\index.js:397:36
    at Generator.next (<anonymous>)
    at fulfilled (D:\a\_actions\swift-actions\setup-swift\v1.25.0\dist\index.js:377:58)

[k-taro56]

This setup is not intended to work on Windows with Swift versions 5.7, 5.7.1, 5.7.2, 5.7.3, 5.8, 5.8.1, 5.9, 5.9.1, and 5.9.2. This is a specification, not a bug.

setup-swift/src/swift-versions.ts

Line 6 in cdbe0f7

["5.9.2", [OS.MacOS, OS.Ubuntu]],

[wadetregaskis]

Oh, that's disappointing. Why has setup-swift dropped Windows support?

[k-taro56]

@wadetregaskis
I agree with you. It seems that the reason is mentioned in the following link, but I would appreciate it if it was explicitly stated.
#499 (comment)