Merge pull request #8109 from cakephp/fix-schema-mapping

Fix incorrect code in database-basics.

Author: dereuromark

en/orm/database-basics.rst

@@ -547,7 +547,10 @@ following::
     {
         public function getSchema(): TableSchemaInterface
         {
-            $this->getSchema()->setColumnType('widget_prefs', 'json');
+            $schema = parent::getSchema();
+            $schema->columnType('widget_prefs', 'json');
+
+            return $schema;
         }
     }