MC-40873: Product is shown as Out of Stock on CMS page when Category Permissions are enabled

Author: yelahin-serhiy

app/code/Magento/Catalog/view/frontend/templates/product/widget/new/content/new_grid.phtml

@@ -89,7 +89,7 @@ if ($exist = ($block->getProductCollection() && $block->getProductCollection()->
                                                         </button>
                                                     <?php endif; ?>
                                                 <?php else :?>
-                                                    <?php if ($_item->getIsSalable()) :?>
+                                                    <?php if ($_item->isAvailable()) :?>
                                                         <div class="stock available">
                                                             <span><?= $block->escapeHtml(__('In stock')) ?></span>
                                                         </div>