Fix test for new SEO widget

tests/PHPUnit/Core/PluginsFunctions/WidgetsListTest.php

@@ -45,7 +45,7 @@ class WidgetsListTest extends DatabaseTestCase
 	        'Actions_SubmenuSitesearch'    => 5,
 	        'Referers_Referers'            => 7,
 	        'Goals_Goals'                  => 1,
-            'SEO'                          => 2,
+            'SEO'                          => 3,
             'Example Widgets'              => 4,
             'ExamplePlugin_exampleWidgets' => 3
         );