MAGETWO-99477：[Backport for 2.2] Eliminate @escapeNotVerified in Checkout-related (CE) Modules

Author: Joan He

app/code/Magento/Checkout/view/frontend/templates/cart/form.phtml

@@ -14,7 +14,7 @@
           method="post"
           id="form-validate"
           data-mage-init='{"Magento_Checkout/js/action/update-shopping-cart":
-              {"validationURL" : "<?= /* @escapeNotVerified */ $block->getUrl('checkout/cart/updateItemQty') ?>",
+              {"validationURL" : "<?= $block->escapeUrl($block->getUrl('checkout/cart/updateItemQty')) ?>",
               "updateCartActionContainer": "#update_cart_action_container"}
           }'
           class="form form-cart">