ENGCOM-5398: #23354 : Data saving problem error showing when leave blank qty and update it #23360

Author: sidolov

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

@@ -62,8 +62,8 @@
                                            name="ship[<?= $block->escapeHtml($_index) ?>][<?= $block->escapeHtml($_item->getQuoteItemId()) ?>][qty]"
                                            value="<?= $block->escapeHtml($_item->getQty()) ?>"
                                            size="2"
-                                           class="input-text qty"
-                                           data-validate="{number: true}"/>
+                                           class="input-text qty required-entry"
+                                           data-validate="{number: true, required:true}"/>
                                 </div>
                             </div>
                         </td>