Fix test

Author: ReubenBond

dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/Sample/07_GroupChat_Workflow_HostAsAgent.cs

@@ -18,6 +18,12 @@ public static async ValueTask RunAsync(TextWriter writer, int maxSteps = 2)
 
         await foreach (AgentRunResponseUpdate update in agent.RunStreamingAsync(thread).ConfigureAwait(false))
         {
+            if (update.RawRepresentation is WorkflowEvent)
+            {
+                // Skip workflow status updates
+                continue;
+            }
+
             string updateText = $"{update.AuthorName
                                    ?? update.AgentId
                                    ?? update.Role.ToString()