Fix locale link FR -> EN

Co-Authored-By: fancyweb <[email protected]>

Author: andrew-demb

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

@@ -1,4 +1,4 @@
 If the ``input`` option is set to ``string``, this option specifies the format
 of the date. This must be a valid `PHP date format`_.
 
-.. _`PHP date format`: https://secure.php.net/manual/fr/function.date.php
+.. _`PHP date format`: https://secure.php.net/manual/en/function.date.php