chore(deps): update dependency apple/swift-syntax to v603

Author: renovate[bot]

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
     platforms: [.macOS(.v15)],
     dependencies: [
         .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.6.2"),
-        .package(url: "https://github.com/apple/swift-syntax.git", from: "601.0.1"),
+        .package(url: "https://github.com/apple/swift-syntax.git", from: "603.0.1"),
         .package(url: "https://github.com/SwiftyJSON/SwiftyJSON.git", from: "5.0.2"),
     ],
     targets: [