minor symfony#19940 Add more necessary information (Euugi)

This PR was submitted for the 7.1 branch but it was merged into the 6.4 branch instead.

Discussion
----------

Add more necessary information

<!--

If your pull request fixes a BUG, use the oldest maintained branch that contains
the bug (see https://symfony.com/releases for the list of maintained branches).

If your pull request documents a NEW FEATURE, use the same Symfony branch where
the feature was introduced (and `7.x` for features of unreleased versions).

-->

Commits
-------

5dfb6fc Add more necessary information

Author: wouterj

reference/forms/types/time.rst

@@ -82,6 +82,9 @@ values for the hour, minute and second fields::
         ],
     ]);
 
+If you want seconds to be displayed as well, take a look at the setting 
+`with_seconds`_, which is by default set to false.
+
 .. include:: /reference/forms/types/options/hours.rst.inc
 
 .. include:: /reference/forms/types/options/html5.rst.inc