Resolved 404 url while updating quantity on multiple address cart page

Resolved 404 form validation url while updating quantity on multiple address cart page

Author: Vikalp Saxena

app/code/Magento/Multishipping/view/frontend/templates/checkout/addresses.phtml

@@ -18,7 +18,7 @@
       data-mage-init='{
           "multiShipping":{},
           "cartUpdate": {
-               "validationURL": "/multishipping/checkout/checkItems",
+               "validationURL": "<?= /* @escapeNotVerified */ $block->getUrl('multishipping/checkout/checkItems') ?>",
                "eventName": "updateMulticartItemQty"
           }}'
       action="<?= $block->escapeUrl($block->getPostActionUrl()) ?>"