fix: align add-to-cart spinner

Author: girishpanchal30

assets/scss/components/compat/woocommerce/_buttons.scss

@@ -53,6 +53,7 @@ a.added_to_cart,
 		justify-content: center;
 		display: inline-flex !important;
 		padding-right: 15px !important;
+		align-items: center;
 
 		&::after {
 			margin-left: 5px;