Fixed property type in docblock

Author: maxalmonte14

app/code/Magento/CustomerImportExport/Model/Import/Address.php

@@ -104,9 +104,9 @@ class Address extends AbstractCustomer
     /**
      * Region collection instance
      *
-     * @var string
+     * @var \Magento\Directory\Model\ResourceModel\Region\Collection
      */
-    protected $_regionCollection;
+    private $_regionCollection;
 
     /**
      * Countries and regions