[go_router_builder] Readme fixes (#1659)

diff --git a/packages/go_router_builder/CHANGELOG.md b/packages/go_router_builder/CHANGELOG.md
index 12c2a00..7f03f70 100644
--- a/packages/go_router_builder/CHANGELOG.md
+++ b/packages/go_router_builder/CHANGELOG.md
@@ -1,3 +1,7 @@
+### 1.0.1
+
+- Documentation fixes. [#102713](https://github.com/flutter/flutter/issues/102713)
+
 ### 1.0.0
 
 - First release.
diff --git a/packages/go_router_builder/README.md b/packages/go_router_builder/README.md
index 8f48091..500ebff 100644
--- a/packages/go_router_builder/README.md
+++ b/packages/go_router_builder/README.md
@@ -186,11 +186,11 @@
 
 ```dart
 class PersonRouteWithExtra extends GoRouteData {
-  PersonRouteWithExtra(this.$extra);
-  final Person $extra;
+  PersonRouteWithExtra({this.$extra});
+  final int? $extra;
 
   @override
-  Widget build(BuildContext context) => PersonScreen(person: $extra);
+  Widget build(BuildContext context) => PersonScreen(personId: $extra);
 }
 ```
 
@@ -287,7 +287,7 @@
   static final _key = LocalKey('my-route-with-key');
 
   @override
-  MaterialPage<void> buildPage(BuildContext context, GoRouterState state) =>
+  MaterialPage<void> buildPage(BuildContext context) =>
     MaterialPage<void>(
       key: _key,
       child: MyPage(),
diff --git a/packages/go_router_builder/pubspec.yaml b/packages/go_router_builder/pubspec.yaml
index dbc340a..a72a4f5 100644
--- a/packages/go_router_builder/pubspec.yaml
+++ b/packages/go_router_builder/pubspec.yaml
@@ -2,7 +2,7 @@
 description: >-
   A builder that supports generated strongly-typed route helpers for
   package:go_router
-version: 1.0.0
+version: 1.0.1
 repository: https://github.com/flutter/packages/tree/main/packages/go_router_builder
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+go_router_builder%22