docs(readme): update middleware usage in client handler

- Removed direct middleware usage for Authenticate and Response.
- Added dynamic middleware loading from defaultMiddlewares method.
- Improved flexibility in handler stack configuration.

Author: guanguans

README.md

@@ -140,19 +140,21 @@ $responses = $client->pool($messages);
 
 ```php
 use Guanguans\Notify\Foundation\Client;
-use Guanguans\Notify\Foundation\Middleware\Authenticate;
-use Guanguans\Notify\Foundation\Middleware\Response;
 use Hyperf\Guzzle\CoroutineHandler;
 use Hyperf\Guzzle\HandlerStackFactory;
+use Hyperf\Guzzle\PoolHandler;
 
 // Set Handler directly
+// $client->setHandler(new PoolHandler);
 $client->setHandler(new CoroutineHandler);
 
 // Or set HandlerStackResolver
 $client->setHandlerStackResolver(static function (Client $client) {
     $handlerStack = (new HandlerStackFactory)->create();
-    $handlerStack->push(new Authenticate($client->getAuthenticator()), Authenticate::class);
-    $handlerStack->push(new Response, Response::class);
+
+    foreach ($client->defaultMiddlewares() as $name => $middleware) {
+        $handlerStack->push($middleware, $name);
+    }
 
     return $handlerStack;
 });