Update copyright year

Co-authored-by: George Barnett <[email protected]>

Author: ktoso

Tests/AsyncHTTPClientTests/HTTPClientTracingTests.swift

@@ -2,7 +2,7 @@
 //
 // This source file is part of the AsyncHTTPClient open source project
 //
-// Copyright (c) 2018-2019 Apple Inc. and the AsyncHTTPClient project authors
+// Copyright (c) 2025 Apple Inc. and the AsyncHTTPClient project authors
 // Licensed under Apache License v2.0
 //
 // See LICENSE.txt for license information