chore(deps): update dependency benchmarkdotnet to 0.15.7

| datasource | package         | from    | to     |
| ---------- | --------------- | ------- | ------ |
| nuget      | BenchmarkDotNet | 0.13.12 | 0.15.7 |

Author: renovate[bot]

Testing/CarbonatePerfTests/CarbonatePerfTests.csproj

@@ -35,7 +35,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="BenchmarkDotNet" Version="0.13.12" />
+      <PackageReference Include="BenchmarkDotNet" Version="0.15.7" />
       <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="8.0.0">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>