[client,gui] Update url_windows.go to offer arm64 executable download

[webash]

Describe your changes

When the Windows arm64 client detects an update, it offers the amd64 download URL instead of the arm64 one; so I borrowed the selection pattern from the macOS client's url_darwin.go

Issue ticket number and link

Relates to #2317

Stack

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)

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Documentation

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• I added/updated documentation for this change
• Documentation is not needed for this change (explain why)

Docs PR URL (required if "docs added" is checked)

Paste the PR link from https://github.com/netbirdio/docs here:

https://github.com/netbirdio/docs/pull/__

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[mlsmaycon]

Thanks. I've left a small suggestion that alignes better to Go's style.

[webash]

Thanks @mlsmaycon - I'm not at all a 'go' coder, so was just doing my best to copy a pattern used by netbird in one of the other distros; but I can definitely see how this is much better.

Should all be ready to go now.

[mlsmaycon]

Thanks @webash appreciate the contribution

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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