Bump ReactiveProperty from 9.3.4 to 9.4.1 (#930)

Bumps [ReactiveProperty](https://github.com/runceel/ReactiveProperty) from 9.3.4 to 9.4.1.
- [Release notes](https://github.com/runceel/ReactiveProperty/releases)
- [Changelog](https://github.com/runceel/ReactiveProperty/blob/main/ReleaseNote-ja.md)
- [Commits](runceel/ReactiveProperty@v9.3.4...9.4.1)

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

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

Directory.Packages.props

@@ -57,7 +57,7 @@
     <PackageVersion Include="OpenTK.OpenAL" Version="5.0.0-pre.8" />
     <PackageVersion Include="OpenTK.Windowing.GraphicsLibraryFramework" Version="5.0.0-pre.9" />
     <PackageVersion Include="PanelExtension" Version="1.0.0" />
-    <PackageVersion Include="ReactiveProperty" Version="9.3.4" />
+    <PackageVersion Include="ReactiveProperty" Version="9.4.1" />
     <PackageVersion Include="Roslynator.Analyzers" Version="4.10.0" />
     <PackageVersion Include="Serilog.Extensions.Logging" Version="8.0.0" />
     <PackageVersion Include="Serilog.Sinks.Async" Version="1.5.0" />