GraphQL-123: Fix regexp when filter by root category id

-- fix static tests

Author: Valeriy Nayda

app/code/Magento/CatalogGraphQl/Model/Resolver/Products/DataProvider/ExtractDataFromCategoryTree.php

@@ -11,7 +11,7 @@
 use Magento\Catalog\Api\Data\CategoryInterface;
 
 /**
- * Extarct data from category tree
+ * Extract data from category tree
  */
 class ExtractDataFromCategoryTree
 {
@@ -30,6 +30,8 @@ public function __construct(
     }
 
     /**
+     * Extract data from category tree
+     *
      * @param \Iterator $iterator
      * @return array
      */