Fix typo stock quantity check

There is a typo in `COALESCE (` which is causing an error when this function is called. The error is present on the checkout page when clicking on payment.

plugins/woocommerce/includes/data-stores/class-wc-product-data-store-cpt.php

@@ -2120,7 +2120,7 @@ class WC_Product_Data_Store_CPT extends WC_Data_Store_WP implements WC_Object_Da
 		global $wpdb;
 		return $wpdb->prepare(
 			"
-			SELECT COALESCE ( MAX( meta_value ), 0 ) FROM $wpdb->postmeta as meta_table
+			SELECT COALESCE( MAX( meta_value ), 0 ) FROM $wpdb->postmeta as meta_table
 			WHERE meta_table.meta_key = '_stock'
 			AND meta_table.post_id = %d
 			",