chore(deps): bump fastlane-plugin-flutter_version (openfoodfacts#3684)

Bumps [fastlane-plugin-flutter_version](https://github.com/tianhaoz95/fastlane-plugin-flutter-version) from `343d0b5` to `520ec90`.
- [Release notes](https://github.com/tianhaoz95/fastlane-plugin-flutter-version/releases)
- [Commits](tianhaoz95/fastlane-plugin-flutter_version@343d0b5...520ec90)

---
updated-dependencies:
- dependency-name: fastlane-plugin-flutter_version
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

packages/smooth_app/ios/Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/tianhaoz95/fastlane-plugin-flutter-version
-  revision: 343d0b549c5bfc1710e30a5d1a57357b8351dccf
+  revision: 520ec908a4dc1c189aae4f990684972f56b4c75f
   specs:
     fastlane-plugin-flutter_version (1.1.15)