Fix a pht method call

Summary: Ref T7046. I missed this in D11680.

Test Plan: `arc lint`

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7046

Differential Revision: https://secure.phabricator.com/D11731

src/infrastructure/markup/interpreter/PhabricatorRemarkupFigletBlockInterpreter.php

@@ -24,7 +24,9 @@ final class PhabricatorRemarkupFigletBlockInterpreter
     if ($err) {
       return $this->markupError(
         pht(
-          'Execution of `figlet` failed:', $stderr));
+          'Execution of `%s` failed: %s',
+          'figlet',
+          $stderr));
     }