ENGCOM-2910: Fix for invalid JSON if image label contains HTML markup, example " #17848

 - Merge Pull Request #17848 from jeroenschipper/magento2:escapeMediaGalleryJsonFix
 - Merged commits:
   1. f185393

Author: magento-engcom-team

app/code/Magento/ProductVideo/view/adminhtml/templates/helper/gallery.phtml

@@ -34,7 +34,7 @@ $elementToggleCode = $element->getToggleCode() ? $element->getToggleCode() : 'to
      class="gallery"
      data-mage-init='{"openVideoModal":{}}'
      data-parent-component="<?= $block->escapeHtml($block->getData('config/parentComponent')) ?>"
-     data-images="<?= $block->escapeHtml($block->getImagesJson()) ?>"
+     data-images="<?= $block->escapeHtmlAttr($block->getImagesJson()) ?>"
      data-types="<?= $block->escapeHtml(
          $this->helper('Magento\Framework\Json\Helper\Data')->jsonEncode($block->getImageTypes())
      ) ?>"