add ext-pdo as a requirement

composer.json

@@ -4,6 +4,7 @@
   "description": "An extension to manage pages in the backend.",
   "require": {
     "php": ">=7.4.0",
+    "ext-pdo": "*",
     "typo3/cms-core": "^10.4 || ^11.5"
   },
   "type": "typo3-cms-extension",