Bump BenchmarkDotNet from 0.13.7 to 0.13.8 in /test/perf/benchmarks

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] <[email protected]>

test/perf/benchmarks/benchmarks.csproj

@@ -18,7 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.7" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.8" />
     <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.13.7"/>
     <PackageReference Include="Microsoft.PowerShell.SDK" Version="7.3.4" />
   </ItemGroup>