Bump BenchmarkDotNet from 0.13.7 to 0.13.8

Bumps [BenchmarkDotNet](https://github.com/dotnet/BenchmarkDotNet) from 0.13.7 to 0.13.8.
- [Release notes](https://github.com/dotnet/BenchmarkDotNet/releases)
- [Commits](dotnet/BenchmarkDotNet@v0.13.7...v0.13.8)

---
updated-dependencies:
- dependency-name: BenchmarkDotNet
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Directory.Packages.props

@@ -6,7 +6,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="Argu" Version="6.1.1" />
-    <PackageVersion Include="BenchmarkDotNet" Version="0.13.7" />
+    <PackageVersion Include="BenchmarkDotNet" Version="0.13.8" />
     <PackageVersion Include="BitCollections" Version="1.0.1" />
     <PackageVersion Include="Chiron" Version="6.3.1" />
     <PackageVersion Include="Covarsky" Version="1.4.2" />