fix warnings

Author: haifengkao

Package.swift

@@ -19,7 +19,7 @@ let package = Package(
     dependencies: [
         // Read Swift code
         .package(
-            url: "https://github.com/swiftlang/swift-syntax.git",
+            url: "https://github.com/apple/swift-syntax.git",
             from: "601.0.0"
         ),
 

Sources/Macro/Macro/TaggedEnum/TaggedEnumMacroBase.swift

@@ -41,7 +41,7 @@ enum TaggedEnumMacroBase {
     // MARK: - Entry Point
 
     static func expansion(
-        of node: AttributeSyntax,
+        of _: AttributeSyntax,
         attachedTo declaration: some DeclGroupSyntax,
         providingExtensionsOf type: some TypeSyntaxProtocol,
         conformancesToGenerate: Set<Conformance>,