[TASK] Add return type to KauderwelschCommand->execute()

Symfony 7 enforces the return type on the basic methods
in command classes, for example the `execute()` method.

The return type `int` can be safely added and works for
symfony 6 and 7.

TYPO3 v12 recently added optional symfony 7 support but
missed to adjust the command return type.

Classes/Command/KauderwelschCommand.php

@@ -35,7 +35,7 @@ class KauderwelschCommand extends Command
      * @param OutputInterface $output
      * @return int
      */
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $output->writeln(GeneralUtility::makeInstance(KauderwelschService::class)->getLoremIpsum());
         return 0;