build(deps): bump Avalonia.ReactiveUI from 0.10.19 to 11.0.4 in /samples

Bumps [Avalonia.ReactiveUI](https://github.com/AvaloniaUI/Avalonia) from 0.10.19 to 11.0.4.
- [Release notes](https://github.com/AvaloniaUI/Avalonia/releases)
- [Commits](AvaloniaUI/Avalonia@0.10.19...11.0.4)

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

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

samples/LoginApp.Avalonia/LoginApp.Avalonia.csproj

@@ -7,7 +7,7 @@
     <ItemGroup>
         <PackageReference Include="Avalonia" Version="0.10.19" />
         <PackageReference Include="Avalonia.Desktop" Version="0.10.19" />
-        <PackageReference Include="Avalonia.ReactiveUI" Version="0.10.19" />
+        <PackageReference Include="Avalonia.ReactiveUI" Version="11.0.4" />
         <PackageReference Include="MessageBox.Avalonia" Version="2.0.1" />
         <PackageReference Include="XamlNameReferenceGenerator" Version="1.6.1" />
     </ItemGroup>