Merge pull request #1185 from dotnet/dependabot/nuget/Ix.NET/Source/BenchmarkDotNet-0.12.1

Bump BenchmarkDotNet from 0.12.0 to 0.12.1 in /Ix.NET/Source

Ix.NET/Source/Benchmarks.System.Interactive/Benchmarks.System.Interactive.csproj

@@ -20,7 +20,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.12.0" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(Configuration)|$(Platform)'=='Ix.net 3.1.1|AnyCPU'">