Bump NDesk.Options.Core from 1.2.6 to 1.2.8 (#7146)

Bumps [NDesk.Options.Core](https://github.com/Latency/NDesk.Options.Core) from 1.2.6 to 1.2.8.
- [Release notes](https://github.com/Latency/NDesk.Options.Core/releases)
- [Commits](Latency/NDesk.Options.Core@v1.2.6...v1.2.8)

---
updated-dependencies:
- dependency-name: NDesk.Options.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/benchmark/Akka.Cluster.Cpu.Benchmark/Akka.Cluster.Cpu.Benchmark.csproj

@@ -6,7 +6,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="NDesk.Options.Core" Version="1.2.6" />
+        <PackageReference Include="NDesk.Options.Core" Version="1.2.8" />
         <PackageReference Include="Tmds.ExecFunction" Version="0.7.1" />
         <PackageReference Include="Universe.CpuUsage" Version="2.2.497.598" />
     </ItemGroup>