Bump FluentAvaloniaUI from 2.0.5 to 2.1.0

Bumps [FluentAvaloniaUI](https://github.com/amwx/FluentAvalonia) from 2.0.5 to 2.1.0.
- [Commits](https://github.com/amwx/FluentAvalonia/commits)

---
updated-dependencies:
- dependency-name: FluentAvaloniaUI
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/MultiConverter/MultiConverter.csproj

@@ -13,7 +13,7 @@
     <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.1.2" />
     <PackageReference Include="Avalonia.ReactiveUI" Version="11.1.2" />
     <PackageReference Include="Avalonia.Xaml.Behaviors" Version="11.1.0" />
-    <PackageReference Include="FluentAvaloniaUI" Version="2.0.5" />
+    <PackageReference Include="FluentAvaloniaUI" Version="2.1.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.2" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />