Apply suggested fix to src/Console/Command/SyncCommand.php from Copilot Autofix (#95)

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

Author: coisa

src/Console/Command/SyncCommand.php

@@ -118,15 +118,15 @@ protected function execute(InputInterface $input, OutputInterface $output): int
     /**
      * Adds a dev-tools command invocation to the process queue.
      *
-     * @param list<string> $arguments the dev-tools command arguments
+     * @param list<string|null> $arguments the dev-tools command arguments
      * @param bool $detached whether the command MAY run detached from subsequent queue entries
      */
     private function queueDevToolsCommand(array $arguments, bool $detached = false): void
     {
         $processBuilder = $this->processBuilder;
 
         foreach ($arguments as $argument) {
-            if (empty($argument)) {
+            if ($argument === null) {
                 continue;
             }