Update ShipIt Verify task description

Summary: Updated the "ShipIt Broken" task description to be a little more user-friendly

Reviewed By: 2d2d2d2d2d

Differential Revision: D31032968

fbshipit-source-id: 9518385d88082e8ac821a9043f6b730c12e077bb

src/shipit/phase/ShipItVerifyRepoPhase.php

@@ -133,8 +133,8 @@ public function getCLIArguments(): vec<ShipItCLIArgument> {
           'git',
           'diff',
           '--stat',
-          'HEAD',
           $dirty_ref,
+          'HEAD',
         )
       )->genRun()
     )->getStdOut();