Fix a variant translation issue

Summary: Fixes T11799. This string is varying on the first parameter, but should vary on the second parameter.

Test Plan: Ran `bin/garbage set-policy ...`, saw proper translation.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T11799

Differential Revision: https://secure.phabricator.com/D16769

src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php

@@ -1402,9 +1402,11 @@ final class PhabricatorUSEnglishTranslation
       ),
 
       'Setting retention policy for "%s" to %s day(s).' => array(
+        array(
           'Setting retention policy for "%s" to one day.',
           'Setting retention policy for "%s" to %s days.',
         ),
+      ),
 
       'Waiting %s second(s) for lease to activate.' => array(
         'Waiting a second for lease to activate.',