fixed comments

Author: torosent

src/Shared/Core/DurableTaskVersionUtil.cs …d/AzureManaged/DurableTaskVersionUtil.cssrc/Shared/Core/DurableTaskVersionUtil.cs renamed to src/Shared/AzureManaged/DurableTaskVersionUtil.cs src/Shared/Core/DurableTaskVersionUtil.cs renamed to src/Shared/AzureManaged/DurableTaskVersionUtil.cs

@@ -6,7 +6,7 @@
 using Azure.Identity;
 using Grpc.Core;
 using Grpc.Net.Client;
-using Grpc.Net.Client.Configuration;
+using Microsoft.DurableTask;
 
 namespace Microsoft.DurableTask;
 
@@ -102,6 +102,8 @@ this.Credential is not null
             async (context, metadata) =>
             {
                 metadata.Add("taskhub", taskHubName);
+                // Add user agent header with durabletask-dotnet and DLL version from util
+                metadata.Add("user-agent", $"{DurableTaskUserAgentUtil.GetUserAgent()}");
                 metadata.Add("workerid", this.WorkerId);
                 if (cache == null)
                 {