simple update

Author: inhere

example/app.php

@@ -79,7 +79,7 @@ public function setRouter(RouterInterface $router)
  * add routes
  */
 $router->get('/', function () {
-    echo 'hello, world';
+    echo '(hello, world)';
 });
 
 $router->get('/hello/{name}', function ($args) {

src/MiddlewareStackAwareTrait.php

@@ -98,6 +98,7 @@ public function callStack(ServerRequestInterface $request)
 
     /**
      * 不要在外部直接调用，内部调用的
+     * @internal
      * {@inheritDoc}
      */
     public function handle(ServerRequestInterface $request): ResponseInterface
@@ -181,4 +182,4 @@ public function getCallableResolver(): CallableResolverInterface
     {
         return $this->callableResolver;
     }
-}
+}