Update docs

Author: Bjorn

Resources/views/Tutorial/datePicker.html.twig

@@ -11,7 +11,7 @@
   <div class="row">
     <div class="col-md-9 col-md-offset-3">
         <pre><code>
-  'format' => DateType::DEFAULT_FORMAT,
+  'format' => IntlDateFormatter::LONG,
   'data' => $currentDate,
   'widget' => 'choice',
   'required' => false,
@@ -98,7 +98,7 @@
   <div class="row">
     <div class="col-md-9 col-md-offset-3">
         <pre><code>
-  'date_format' => DateTimeType::DEFAULT_DATE_FORMAT,
+  'date_format' => IntlDateFormatter::LONG,
   'data' => $currentDate,
   'widget' => 'choice',
   'required' => false,