Add required package to feed

Author: dibarbet

eng/config/PublishData.json

@@ -49,6 +49,7 @@
       "Microsoft.CodeAnalysis.ExternalAccess.IntelliTrace": "vs-impl",
       "Microsoft.CodeAnalysis.ExternalAccess.ProjectSystem": "vs-impl",
       "Microsoft.CodeAnalysis.ExternalAccess.OmniSharp": "arcade",
+      "Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.CSharp": "arcade",
       "Microsoft.CodeAnalysis.ExternalAccess.Razor": "vs-impl",
       "Microsoft.CodeAnalysis.ExternalAccess.TypeScript": "vs-impl",
       "Microsoft.CodeAnalysis.ExternalAccess.UnitTesting": "vs-impl",
@@ -105,6 +106,7 @@
       "Microsoft.CodeAnalysis.ExternalAccess.IntelliTrace": "arcade",
       "Microsoft.CodeAnalysis.ExternalAccess.ProjectSystem": "arcade",
       "Microsoft.CodeAnalysis.ExternalAccess.OmniSharp": "arcade",
+      "Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.CSharp": "arcade",
       "Microsoft.CodeAnalysis.ExternalAccess.Razor": "arcade",
       "Microsoft.CodeAnalysis.ExternalAccess.TypeScript": "arcade",
       "Microsoft.CodeAnalysis.ExternalAccess.UnitTesting": "arcade",