fix SF 8.0 compatibility on e2e tests

Author: llaville

tests/EndToEnd/LintCommandTest.php

@@ -43,7 +43,7 @@ protected function setUp(): void
         $this->command = new LintCommand($dispatcher);
 
         $application = new Application();
-        $application->add($this->command);
+        $application->addCommand($this->command);
         $application->setDefaultCommand($this->command->getName());
         $application->setDispatcher($dispatcher);