Add loading="lazy" to image.phtml

Author: Timon de Groot

app/code/Magento/Catalog/view/frontend/templates/product/image.phtml

@@ -12,6 +12,7 @@
 <img class="photo image <?= $escaper->escapeHtmlAttr($block->getClass()) ?>"
      <?= $escaper->escapeHtml($block->getCustomAttributes()) ?>
      src="<?= $escaper->escapeUrl($block->getImageUrl()) ?>"
+     loading="lazy"
      width="<?= $escaper->escapeHtmlAttr($block->getWidth()) ?>"
      height="<?= $escaper->escapeHtmlAttr($block->getHeight()) ?>"
      alt="<?= /* @noEscape */ $block->stripTags($block->getLabel(), null, true) ?>" />