build(deps): bump material_design_icons_flutter

Bumps [material_design_icons_flutter](https://github.com/ziofat/material_design_icons_flutter) from 6.0.7296 to 7.0.7296.
- [Changelog](https://github.com/ziofat/material_design_icons_flutter/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ziofat/material_design_icons_flutter/commits)

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

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

modules/serverpod_auth/serverpod_auth_firebase_flutter/pubspec.yaml

@@ -18,7 +18,7 @@ dependencies:
   firebase_ui_auth: ^1.2.2
   flutter:
     sdk: flutter
-  material_design_icons_flutter: ">=6.0.0 <7.0.0"
+  material_design_icons_flutter: ">=6.0.0 <8.0.0"
   serverpod_auth_client: 2.0.2
   serverpod_auth_shared_flutter: 2.0.2