Bump System.Resources.Extensions and Microsoft.NETFramework.Reference…

…Assemblies

Bumps [System.Resources.Extensions](https://github.com/dotnet/runtime) and [Microsoft.NETFramework.ReferenceAssemblies](https://github.com/Microsoft/dotnet). These dependencies needed to be updated together.

Updates `System.Resources.Extensions` from 6.0.0 to 9.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v6.0.0...v9.0.0)

Updates `Microsoft.NETFramework.ReferenceAssemblies` from 1.0.3 to 1.0.3
- [Commits](https://github.com/Microsoft/dotnet/commits)

---
updated-dependencies:
- dependency-name: System.Resources.Extensions
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Microsoft.NETFramework.ReferenceAssemblies
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Ookii.Dialogs.WinForms/Ookii.Dialogs.WinForms.csproj

@@ -50,7 +50,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Resources.Extensions" Version="6.0.0" />
+    <PackageReference Include="System.Resources.Extensions" Version="9.0.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
   </ItemGroup>