Update changelog and version

Author: LukasMirbt

packages/go_router/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 16.2.1
+
+- Adds state restoration topic to documentation
+
 ## 16.2.0
 
 - Adds `RelativeGoRouteData` and `TypedRelativeGoRoute`.

packages/go_router/example/lib/state_restoration/shell_route_state_restoration.dart

@@ -1,3 +1,7 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 

packages/go_router/example/lib/state_restoration/stateful_shell_state_restoration.dart

@@ -1,3 +1,7 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 

packages/go_router/pubspec.yaml

@@ -1,7 +1,7 @@
 name: go_router
 description: A declarative router for Flutter based on Navigation 2 supporting
   deep linking, data-driven routes and more
-version: 16.2.0
+version: 16.2.1
 repository: https://github.com/flutter/packages/tree/main/packages/go_router
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+go_router%22