Fixes wording about multiple twig filters

Author: kane-menicou

components/form.rst

@@ -246,13 +246,13 @@ Translation
 ~~~~~~~~~~~
 
 If you're using the Twig integration with one of the default form theme files
-(e.g. ``form_div_layout.html.twig``), there are 2 Twig filters (``trans``)
-that are used for translating form labels, errors, option
+(e.g. ``form_div_layout.html.twig``), there is a Twig filter (``trans``)
+that is used for translating form labels, errors, option
 text and other strings.
 
-To add these Twig filters, you can either use the built-in
+To add the ``trans`` Twig filter, you can either use the built-in
 :class:`Symfony\\Bridge\\Twig\\Extension\\TranslationExtension` that integrates
-with Symfony's Translation component, or add the 2 Twig filters yourself,
+with Symfony's Translation component, or add the Twig filter yourself,
 via your own Twig extension.
 
 To use the built-in integration, be sure that your project has Symfony's