Bump BenchmarkDotNet from 0.15.4 to 0.15.5#5

dependabot[bot] wants to merge 1 commit intomainkusl/npgsql10:mainfrom

dependabot/nuget/BenchmarkDotNet-0.15.5kusl/npgsql10:dependabot/nuget/BenchmarkDotNet-0.15.5Copy head branch name to clipboard