[TwigBridge] Documented the new lint:twig behavior when passing no arguments

Author: javiereguiluz

templates.rst

@@ -563,12 +563,18 @@ errors. It's useful to run it before deploying your application to production
 
 .. code-block:: terminal
 
-    # check all the templates stored in a directory
-    $ php bin/console lint:twig templates/
+    # check all the application templates
+    $ php bin/console lint:twig
 
-    # you can also check individual templates
+    # you can also check directories and individual templates
+    $ php bin/console lint:twig templates/email/
     $ php bin/console lint:twig templates/article/recent_list.html.twig
 
+.. versionadded:: 4.4
+
+    The feature that checks all the application templates when not passing any
+    arguments to ``lint:twig`` was introduced in Symfony 4.4.
+
 Inspecting Twig Information
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~