Add explicity AsyncInterfaces reference for

Author: jsquire

src/OpenAI.csproj

@@ -84,6 +84,10 @@
     <PackageReference Include="System.ClientModel" Version="1.5.1" />
   </ItemGroup>
 
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net6.0'">
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
+  </PropertyGroup>
+
   <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="8.0.1" />
   </ItemGroup>