build(deps): bump MessageBox.Avalonia from 1.7.1 to 2.0.1 in /samples (#464)

Bumps [MessageBox.Avalonia](https://github.com/CreateLab/MessageBox.Avalonia) from 1.7.1 to 2.0.1.
- [Release notes](https://github.com/CreateLab/MessageBox.Avalonia/releases)
- [Commits](https://github.com/CreateLab/MessageBox.Avalonia/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

samples/LoginApp.Avalonia/LoginApp.Avalonia.csproj

@@ -8,7 +8,7 @@
         <PackageReference Include="Avalonia" Version="0.10.15" />
         <PackageReference Include="Avalonia.Desktop" Version="0.10.15" />
         <PackageReference Include="Avalonia.ReactiveUI" Version="0.10.15" />
-        <PackageReference Include="MessageBox.Avalonia" Version="1.7.1" />
+        <PackageReference Include="MessageBox.Avalonia" Version="2.0.1" />
         <PackageReference Include="XamlNameReferenceGenerator" Version="1.3.4" />
     </ItemGroup>