Bump fluent_ui from 3.10.2 to 3.10.3 in /simplistic_calculator (#1081)

Bumps [fluent_ui](https://github.com/bdlukaa/fluent_ui) from 3.10.2 to 3.10.3.
- [Release notes](https://github.com/bdlukaa/fluent_ui/releases)
- [Changelog](https://github.com/bdlukaa/fluent_ui/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bdlukaa/fluent_ui/commits/v.3.10.3)

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

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simplistic_calculator/pubspec.lock

@@ -70,7 +70,7 @@ packages:
       name: fluent_ui
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.10.2"
+    version: "3.10.3"
   fluentui_system_icons:
     dependency: "direct main"
     description: