Projects - re-label "Workboards" as "Workboard"

Summary: better aligns user expectations with product reality. Fixes T6391.

Test Plan: viewed a project and saw "workboard". viewed some project search results in /project and saw "workboard".

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6391

Differential Revision: https://secure.phabricator.com/D10747

src/applications/project/controller/PhabricatorProjectProfileController.php

@@ -66,7 +66,7 @@ final class PhabricatorProjectProfileController
           ->setIconFont('fa-columns');
     $board_btn = id(new PHUIButtonView())
         ->setTag('a')
-        ->setText(pht('Workboards'))
+        ->setText(pht('Workboard'))
         ->setHref($this->getApplicationURI("board/{$id}/"))
         ->setIcon($icon);