Update README.md

Author: ipranjal

README.md

@@ -50,10 +50,10 @@ composer require scrawler/arca
         'driver' => 'pdo_mysql', //You can use other supported driver this is the most basic mysql driver
     );
 
-    // For Arca ORM 3.x
+    // For Arca ORM 1.x
     // $db =  new \Scrawler\Arca\Database($connectionParams);
 
-    For Arca 4.x and later 
+    For Arca 2.x and later 
     $db = \Scrawler\Arca\Facade\Database::connect($connectionParams);
 
 ```