typings: fix missing property in ExportedHooks

PR-URL: #49567
Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com>
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

lib/internal/modules/esm/hooks.js

@@ -73,6 +73,7 @@ let importMetaInitializer;
 
 /**
  * @typedef {object} ExportedHooks
+ * @property {Function} initialize Customizations setup hook.
  * @property {Function} globalPreload Global preload hook.
  * @property {Function} resolve Resolve hook.
  * @property {Function} load Load hook.