Fix typo in replacement event name for onUserBeforeDataValidation (#45296)

Author: Fedik

libraries/src/MVC/Model/FormModel.php

@@ -200,7 +200,7 @@ public function validate($form, $data, $group = null)
         if (!empty($dispatcher->getListeners('onUserBeforeDataValidation'))) {
             @trigger_error(
                 'The `onUserBeforeDataValidation` event is deprecated and will be removed in 6.0.'
-                . 'Use the `onContentValidateData` event instead.',
+                . 'Use the `onContentBeforeValidateData` event instead.',
                 E_USER_DEPRECATED
             );