Bump go_router from 10.2.0 to 11.0.0 in /testing_app (#2030)

Bumps [go_router](https://github.com/flutter/packages/tree/main/packages) from 10.2.0 to 11.0.0.
<details>
<summary>Commits</summary>
<ul>
<li><a href="55b7293656"><code>55b7293</code></a> [go_router] Fixes the GoRouter.goBranch so that it doesn't reset extr… (<a href="https://github.com/flutter/packages/tree/main/packages/issues/4723">#4723</a>)</li>
<li><a href="7eee49a471"><code>7eee49a</code></a> [webview_flutter_wkwebview] Adds WKWebView implementation to override console...</li>
<li><a href="d0411e450a"><code>d0411e4</code></a> [various] Update invalid NSURL tests (<a href="https://github.com/flutter/packages/tree/main/packages/issues/4959">#4959</a>)</li>
<li><a href="51e74b9750"><code>51e74b9</code></a> [ios_platform_images] Convert to Pigeon (<a href="https://github.com/flutter/packages/tree/main/packages/issues/4945">#4945</a>)</li>
<li><a href="d08ebfd2b7"><code>d08ebfd</code></a> [go_router_builder] Generate initialLocation with StatefulShellBranchConfig (...</li>
<li>See full diff in <a href="https://github.com/flutter/packages/commits/go_router-v11.0.0/packages">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=go_router&package-manager=pub&previous-version=10.2.0&new-version=11.0.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

</details>

testing_app/pubspec.yaml

@@ -12,7 +12,7 @@ dependencies:
 
   cupertino_icons: ^1.0.3
   provider: ^6.0.2
-  go_router: ^10.0.0
+  go_router: ">=10.0.0 <12.0.0"
 
 dev_dependencies:
   analysis_defaults: