reverted previous changes

Author: esteban-serfe

app/code/Magento/Usps/Model/Carrier.php

@@ -834,9 +834,9 @@ public function getCode($type, $code = '')
                 '0_FCPC' => 'First Class',
                 '1' => 'Priority',
                 '2' => 'Priority Express',
-                '3' => 'Ground Advantage',
+                '3' => 'Priority Express',
                 '4' => 'Retail Ground',
-                '6' => 'Ground Advantage',
+                '6' => 'Media',
                 '7' => 'Library',
                 '9' => 'Ground Advantage',
                 '13' => 'Priority Express',