今回から versioning スキームが変わってますが、5.8 対応リリースです https://github.com/apple/swift-syntax/releases/tag/508.0.0

This is the 508.0.0 release of SwiftSyntax, aligned with the release of Swift 5.8. To use this snapshot add the following dependency to your Package.swift: .package(url: "https://github.com/ap...