#2182 add dotnet 6 as TFM (#2194)

* #2182 add dotnet 6 as TFM

* #2182 add dotnet 6 as TFM

---------

Co-authored-by: Robert Yokota <[email protected]>

Author: thompson-tomo

src/Confluent.SchemaRegistry/Confluent.SchemaRegistry.csproj

@@ -28,10 +28,13 @@
     <ProjectReference Include="..\Confluent.Kafka\Confluent.Kafka.csproj" />
   </ItemGroup>
 
+  <ItemGroup  Condition=" '$(TargetFramework)' == 'netstandard1.3' or '$(TargetFramework)' == 'netstandard2.0' ">
+    <PackageReference Include="System.Net.Http" Version="4.3.4" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="8.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="System.Net.Http" Version="4.3.4" />
   </ItemGroup>
 
   <ItemGroup>