AC-10686: [PCI] SRI enabled on payment pages.

Static test fix.

Author: admanesachin

app/code/Magento/Csp/Block/Sri/Hashes.php

@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Csp\Block\Sri;
 
 use Magento\Framework\UrlInterface;