Add NuGet reference to config abstractions in MediaBrowser.Common project

MediaBrowser.Common/MediaBrowser.Common.csproj

@@ -12,6 +12,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="3.1.1" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.1" />
     <PackageReference Include="Microsoft.Net.Http.Headers" Version="2.2.8" />
   </ItemGroup>