fix: Extension search param support

Author: dogukanoksuz

app/Http/Controllers/API/Settings/ExtensionController.php

@@ -101,8 +101,7 @@ public function upload()
         $list = $this->setupNewExtension($zipFile, $verify);
         $error = $list[0];
         $new = $list[1];
-        if (isset($list[2])) $old = $list[2];
-        else $old = [];
+        $old = $list[2] ?? [];
 
         if ($error) {
             return $error;