chore(deps): update dependency benchmarkdotnet to 0.15.8 (#4216)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [BenchmarkDotNet](https://redirect.github.com/dotnet/BenchmarkDotNet)
| `0.15.6` -> `0.15.8` |
![age](https://developer.mend.io/api/mc/badges/age/nuget/BenchmarkDotNet/0.15.8?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/BenchmarkDotNet/0.15.6/0.15.8?slim=true)
|

---

### Release Notes

<details>
<summary>dotnet/BenchmarkDotNet (BenchmarkDotNet)</summary>

###
[`v0.15.8`](https://redirect.github.com/dotnet/BenchmarkDotNet/releases/tag/v0.15.8):
BenchmarkDotNet v0.15.8

Full changelog: <https://benchmarkdotnet.org/changelog/v0.15.8.html>

###
[`v0.15.7`](https://redirect.github.com/dotnet/BenchmarkDotNet/releases/tag/v0.15.7):
BenchmarkDotNet v0.15.7

Full changelog: <https://benchmarkdotnet.org/changelog/v0.15.7.html>

</details>

---

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src/Benchmarks/Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="BenchmarkDotNet" Version="0.15.6" />
+    <PackageVersion Include="BenchmarkDotNet" Version="0.15.8" />
   </ItemGroup>
 
    <!-- Inherit parent props file if one exists. -->