Leverage First-class callable syntax

Author: tigitz

Tests/Kernel/MicroKernelTraitTest.php

@@ -129,7 +129,7 @@ protected function configureContainer(ContainerConfigurator $c): void
 
             protected function configureRoutes(RoutingConfigurator $routes): void
             {
-                $routes->add('hello', '/')->controller([$this, 'helloAction']);
+                $routes->add('hello', '/')->controller($this->helloAction(...));
             }
         };