Correct a "bin/mail" command in "Show Raw Email" help text

Summary: Fixes T12068. These are inbound messages, not outbound.

Test Plan: Read carefully.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12068

Differential Revision: https://secure.phabricator.com/D17144

src/applications/transactions/controller/PhabricatorApplicationTransactionCommentRawController.php

@@ -48,7 +48,7 @@ final class PhabricatorApplicationTransactionCommentRawController
             $title = pht('Email Body Text');
             $body = $message->getRawTextBody();
             $details_text = pht(
-              'For full details, run `/bin/mail show-outbound --id %d`',
+              'For full details, run `/bin/mail show-inbound --id %d`',
               $source_id);
             $addendum = new PHUIRemarkupView($viewer, $details_text);
           }