Bump BenchmarkDotNet from 0.12.0 to 0.12.1 (#172)

Author: dependabot-preview[bot]

src/Hyperion.Benchmarks/Hyperion.Benchmarks.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.12.0" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
   </ItemGroup>
 
   <ItemGroup>