Bump dependency BenchmarkDotNet to 0.15.8 (#599)

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| nuget      | BenchmarkDotNet | 0.15.7 | 0.15.8 |

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

Author: renovate[bot]

perf/TodoApp.Benchmarks/TodoApp.Benchmarks.csproj

@@ -9,6 +9,6 @@
   </ItemGroup>
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="BenchmarkDotNet" Version="0.15.7" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.8" />
   </ItemGroup>
 </Project>