Bump pigeon from 25.5.0 to 26.0.0 in /add_to_app/books/flutter_module_books (#2698)

Bumps [pigeon](https://github.com/flutter/packages/tree/main/packages) from 25.5.0 to 26.0.0.
<details>
<summary>Commits</summary>
<ul>
<li><a href="f0a66f1fb7"><code>f0a66f1</code></a> [pigeon] Adds overrides for constructors and static members of ProxyApis (<a href="https://github.com/flutter/packages/tree/main/packages/issues/9515">#9515</a>)</li>
<li><a href="cb8fef6299"><code>cb8fef6</code></a> [dependabot]: Bump androidx.activity:activity from 1.9.3 to 1.10.1 in /packag...</li>
<li><a href="dedd2f0d5e"><code>dedd2f0</code></a> [webview_flutter] Update androidx.webkit to 1.14.0 (<a href="https://github.com/flutter/packages/tree/main/packages/issues/9638">#9638</a>)</li>
<li><a href="2496670aa5"><code>2496670</code></a> [dependabot]: Bump com.google.android.gms:play-services-maps from 18.2.0 to 1...</li>
<li><a href="85daf43681"><code>85daf43</code></a> [dependabot]: Bump androidx.fragment:fragment from 1.6.2 to 1.8.8 in /package...</li>
<li><a href="f19ecddeea"><code>f19ecdd</code></a> [image_picker] redesign example app (<a href="https://github.com/flutter/packages/tree/main/packages/issues/9625">#9625</a>)</li>
<li><a href="e2c722215a"><code>e2c7222</code></a> [camera_avfoundation] Implementation swift migration - part 7 (<a href="https://github.com/flutter/packages/tree/main/packages/issues/9595">#9595</a>)</li>
<li><a href="12fad6d68d"><code>12fad6d</code></a> [webview_flutter_wkwebview] Replace Flutter method failure assertion with nsl...</li>
<li><a href="1dc479bc08"><code>1dc479b</code></a> [webview_flutter] Add setMixedContentMode for Android (<a href="https://github.com/flutter/packages/tree/main/packages/issues/9586">#9586</a>)</li>
<li><a href="2b0ecd2eba"><code>2b0ecd2</code></a> [google_sign_in] Add exception info to migration guide (<a href="https://github.com/flutter/packages/tree/main/packages/issues/9574">#9574</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/flutter/packages/commits/pigeon-v26.0.0/packages">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=pigeon&package-manager=pub&previous-version=25.5.0&new-version=26.0.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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</details>

add_to_app/books/flutter_module_books/pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
 dev_dependencies:
   analysis_defaults:
     path: ../../../analysis_defaults
-  pigeon: ">=11.0.0 <26.0.0"
+  pigeon: ">=11.0.0 <27.0.0"
   flutter_test:
     sdk: flutter