Update Program.cs

Author: alexwolfmsft

docs/azure/sdk/snippets/dependency-injection/HostBuilder/Program.cs

@@ -19,7 +19,7 @@
 
             // Set a credential for all clients to use by default
             DefaultAzureCredential credential = new();
-            clientBuilder.UseCredential(new DefaultAzureCredential());
+            clientBuilder.UseCredential(credential);
 
             // Register a subclient for each Service Bus Queue
             foreach (string queue in queueNames)