Bump Ookii.Dialogs.Wpf from 2.1.0 to 3.1.0 (Demo.csproj)

Bumps [Ookii.Dialogs.Wpf](https://github.com/augustoproiete/ookii-dialogs-wpf) from 2.1.0 to 3.1.0.
- [Release notes](https://github.com/augustoproiete/ookii-dialogs-wpf/releases)
- [Commits](ookii-dialogs/ookii-dialogs-wpf@v2.0.0...v3.1.0)

Author: augustoproiete-bot

demo/Demo.csproj

@@ -13,9 +13,9 @@
     <PackageReference Include="Nito.Mvvm.Async" />
     <PackageReference Include="Nito.Mvvm.CalculatedProperties" />
     <PackageReference Include="Nito.Mvvm.Core" />
-    <PackageReference Include="Ookii.Dialogs.Wpf.NETCore" />
+    <PackageReference Include="Ookii.Dialogs.Wpf" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\src\ImageHash\ImageHash.csproj" />
   </ItemGroup>
-</Project>
+</Project>