[go_router] Fix @tool directive with missing @end-tool (flutter#4998)

Fixes
https://logs.chromium.org/logs/dart/buildbucket/cr-buildbucket/8768923225300611905/+/u/Run_flutter_plugins_tests/stdout

Each `{@tool}` tag must also have an `{@end-tool}` tag.

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Author: srawlins

packages/go_router/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 11.1.1
+
+- Fixes a missing `{@end-tool}` doc directive tag for `GoRoute.name`.
+
 ## 11.1.0
 
 - Adds optional parameter `overridePlatformDefaultLocation` to override initial route set by platform.

packages/go_router/lib/src/route.dart

@@ -260,6 +260,7 @@ class GoRoute extends RouteBase {
   ///   queryParameters: <String, String>{'qid': 'quid'},
   /// );
   /// ```
+  /// {@end-tool}
   ///
   /// See the [named routes example](https://github.com/flutter/packages/blob/main/packages/go_router/example/lib/named_routes.dart)
   /// for a complete runnable app.

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: 11.1.0
+version: 11.1.1
 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