Update Program.cs

Author: alexwolfmsft

docs/azure/sdk/snippets/dependency-injection/WebApplicationBuilder/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)