Merge branch '6.3' into 7.0

* 6.3:
  [Form] Deprecate not setting a value for widget option of date/time types

Author: javiereguiluz

reference/forms/types/options/date_widget_description.rst.inc

@@ -10,3 +10,8 @@ following:
 
 * ``single_text``: renders a single input of type ``date``. User's input
   is validated based on the `format`_ option.
+
+.. deprecated:: 6.3
+
+    Not setting a value explicitly for this option is deprecated since Symfony 6.3
+    because the default value will change to ``single_text`` in Symfony 7.0.