minor #15057 [Translation] Update translation.rst (sebpacz)

This PR was merged into the 4.4 branch.

Discussion
----------

[Translation] Update translation.rst

The `trans()` in the `translator` service is a method, not a function.

<!--

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 `5.x` for features of unreleased versions).

-->

Commits
-------

e98f953 [Translation] Update translation.rst

Author: javiereguiluz

translation.rst

@@ -352,7 +352,7 @@ The ``translation:update`` command looks for missing translations in:
   defined in the :ref:`twig.default_path <config-twig-default-path>` and
   :ref:`twig.paths <config-twig-paths>` config options);
 * Any PHP file/class that injects or :doc:`autowires </service_container/autowiring>`
-  the ``translator`` service and makes calls to the ``trans()`` function.
+  the ``translator`` service and makes calls to the ``trans()`` method.
 
 .. versionadded:: 4.3