fix: Symfony 7.3 compatibility of SingleCommand with output (#325)

Author: chr-hertel

example

@@ -5,7 +5,7 @@ use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\Table;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
-use Symfony\Component\Console\Output\ConsoleOutput;
+use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\SingleCommandApplication;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symfony\Component\Finder\Finder;
@@ -17,7 +17,7 @@ require_once __DIR__.'/vendor/autoload.php';
 $app = (new SingleCommandApplication('LLM Chain Example Runner'))
     ->setDescription('Runs all LLM Chain examples in folder examples/')
     ->addArgument('subdirectory', InputArgument::OPTIONAL, 'Subdirectory to run examples from, e.g. "anthropic" or "huggingface".')
-    ->setCode(function (InputInterface $input, ConsoleOutput $output) {
+    ->setCode(function (InputInterface $input, OutputInterface $output) {
         $io = new SymfonyStyle($input, $output);
         $io->title('LLM Chain Examples');