Added the versionadded directive

Author: javiereguiluz

translation/lint.rst

@@ -26,6 +26,9 @@ translation file using the ``lint:yaml`` and ``lint:xliff`` commands:
     $ ./bin/console lint:yaml translations path/to/trans
     $ ./bin/console lint:xliff translations/messages.en.xlf translations/messages.es.xlf
 
+.. versionadded:: 4.2
+    The feature to lint multiple files and directories was introduced in Symfony 4.2.
+
 The linter results can be exported to JSON using the ``--format`` option:
 
 .. code-block:: terminal