Bump pigeon in /add_to_app/books/flutter_module_books (#1550)

Bumps [pigeon](https://github.com/flutter/packages/tree/main/packages) from 4.2.14 to 5.0.0.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/pigeon-v5.0.0/packages)

---
updated-dependencies:
- dependency-name: pigeon
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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add_to_app/books/flutter_module_books/pubspec.yaml

@@ -13,7 +13,7 @@ dependencies:
     sdk: flutter
 
 dev_dependencies:
-  pigeon: ">=2.0.2 <5.0.0"
+  pigeon: ">=2.0.2 <6.0.0"
   flutter_test:
     sdk: flutter
   flutter_lints: ^2.0.1