Added description

Author: akaplya

app/code/Magento/CatalogSearch/Setup/Patch/Data/SetInitialSearchWeightForAttributes.php

@@ -13,6 +13,9 @@
 use Magento\Catalog\Api\ProductAttributeRepositoryInterface;
 
 /**
+ * This patch sets up search weight for the product's system attributes.
+ * Reindex required after patch applying.
+ *
  * @deprecated
  * @see \Magento\ElasticSearch
  */