Bump BenchmarkDotNet from 0.13.8 to 0.13.9

Bumps [BenchmarkDotNet](https://github.com/dotnet/BenchmarkDotNet) from 0.13.8 to 0.13.9.
- [Release notes](https://github.com/dotnet/BenchmarkDotNet/releases)
- [Commits](dotnet/BenchmarkDotNet@v0.13.8...v0.13.9)

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

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

Author: dependabot[bot]

IDisposableAnalyzers.Benchmarks/IDisposableAnalyzers.Benchmarks.csproj

@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.8" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.9" />
     <PackageReference Include="Gu.Analyzers" Version="2.0.3" PrivateAssets="all" />
     <PackageReference Include="Gu.Roslyn.Asserts" Version="4.3.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.5.0" />