[go_router] fix error handling page link (#4296)

I have corrected the link to the document, as it was incorrect.

packages/go_router/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 9.1.1
+
+- Fixes a link in error handling documentation.
+
 ## 9.1.0
 
 - Adds the parentNavigatorKey parameter to ShellRouteData and StatefulShellRouteData.

packages/go_router/lib/src/router.dart

@@ -46,7 +46,7 @@ typedef GoExceptionHandler = void Function(
 /// `errorPageBuilder` to build a page for the Router if it is not null;
 /// otherwise, it is passed to `errorBuilder` instead. If none of them are
 /// provided, go_router builds a default error screen to show the exception.
-/// See [Error handling](https://pub.dev/documentation/go_router/latest/topics/error-handling.html)
+/// See [Error handling](https://pub.dev/documentation/go_router/latest/topics/Error%20handling-topic.html)
 /// for more details.
 ///
 /// See also:

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: 9.1.0
+version: 9.1.1
 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