Bump BenchmarkDotNet from 0.15.2 to 0.15.6

---
updated-dependencies:
- dependency-name: BenchmarkDotNet
  dependency-version: 0.15.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

benchmarks/EasyCompressor.Benchmarks/EasyCompressor.Benchmarks.csproj

@@ -24,7 +24,7 @@
     <PackageReference Include="EasyCaching.Serialization.Json" Version="1.9.2" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.8" />
 
-    <PackageReference Include="BenchmarkDotNet" Version="0.15.2" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.15.6" />
     <PackageReference Include="BenchmarkDotNetVisualizer" Version="2.1.0" />
     <PackageReference Include="protobuf-net" Version="3.2.56" />
     <PackageReference Include="MessagePack" Version="3.1.4" />