Bump flutter_zxing from 0.7.0 to 0.7.1 in /example

Bumps [flutter_zxing](https://github.com/khoren93/flutter_zxing) from 0.7.0 to 0.7.1.
- [Release notes](https://github.com/khoren93/flutter_zxing/releases)
- [Changelog](https://github.com/khoren93/flutter_zxing/blob/main/CHANGELOG.md)
- [Commits](https://github.com/khoren93/flutter_zxing/commits)

---
updated-dependencies:
- dependency-name: flutter_zxing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

example/pubspec.lock

@@ -148,7 +148,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.7.0"
+    version: "0.7.1"
   font_awesome_flutter:
     dependency: "direct main"
     description:

example/pubspec.yaml

@@ -11,6 +11,7 @@ dependencies:
     sdk: flutter
   flutter_zxing:
     path: ../
+    version: ^0.7.1
   font_awesome_flutter: ^10.1.0
   image: ^3.2.0
   image_picker: ^0.8.5