Merge branch '2.4.9-alpha1-develop' into ACQE-7977-sync-b2b-automation

Author: chandrakalahanchinal

app/code/Magento/ProductAlert/Model/UpdateThemeParams.php

@@ -37,15 +37,15 @@ public function __construct(
      * Update theme params for multi store email templates
      *
      * @param Resolver $subject
-     * @param string $template
+     * @param string|null $template
      * @param array $params
      * @return array
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      * @throws NoSuchEntityException
      */
     public function beforeGetTemplateFileName(
         Resolver $subject,
-        string $template,
+        string|null $template,
         array $params = []
     ): array {
         if ($template === $this->stock->getTemplate() && !isset($params['themeId'])) {