build(deps): bump XamlNameReferenceGenerator in /samples (#261)

Bumps [XamlNameReferenceGenerator](https://github.com/avaloniaui/Avalonia.NameGenerator) from 1.1.2 to 1.2.1.
- [Release notes](https://github.com/avaloniaui/Avalonia.NameGenerator/releases)
- [Commits](AvaloniaUI/Avalonia.NameGenerator@1.1.2...1.2.1)

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

samples/LoginApp.Avalonia/LoginApp.Avalonia.csproj

@@ -10,7 +10,7 @@
         <PackageReference Include="Avalonia.ReactiveUI" Version="0.10.2" />
         <PackageReference Include="Citrus.Avalonia" Version="1.4.3" />
         <PackageReference Include="MessageBox.Avalonia" Version="1.2.0" />
-        <PackageReference Include="XamlNameReferenceGenerator" Version="1.1.2" />
+        <PackageReference Include="XamlNameReferenceGenerator" Version="1.2.1" />
     </ItemGroup>
 
     <ItemGroup>