Update for Flutter 3.10 beta (#1746)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] All existing and new tests are passing.

---------

Co-authored-by: David Iglesias <ditman@gmail.com>
Co-authored-by: Mark Thompson <2554588+MarkTechson@users.noreply.github.com>
Co-authored-by: John Ryan <ryjohn@google.com>

deeplink_store_example/lib/main.dart

@@ -30,14 +30,18 @@ class MyApp extends StatelessWidget {
       debugShowCheckedModeBanner: false,
       routerConfig: GoRouter(
         routes: [
-          GoRoute(path: '/', builder: (_, __) => const ProductList(),
+          GoRoute(
+            path: '/',
+            builder: (_, __) => const ProductList(),
             routes: [
               GoRoute(path: ':id', builder: (_, __) => const ProductDetails()),
             ],
           ),
-          GoRoute(path: '/category/:category', builder: (_, __) => const ProductCategoryList()),
+          GoRoute(
+              path: '/category/:category',
+              builder: (_, __) => const ProductCategoryList()),
         ],
       ),
     );
   }
-}
+}