Update dependency BenchmarkDotNet.Diagnostics.Windows to 0.15.6 (#1341)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -11,7 +11,7 @@
     <VisualStudioThreadingVersion>17.14.15</VisualStudioThreadingVersion>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.15.5" />
+    <PackageVersion Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.15.6" />
     <PackageVersion Include="MessagePack" Version="$(MessagePackVersion)" />
     <PackageVersion Include="MessagePackAnalyzer" Version="$(MessagePackVersion)" />
     <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="2.2.0" />