Check for correct message

The wrong state was picked in the past, PHPStan found this in an unrelated other issue.

webapp/tests/Unit/Controller/Jury/JuryMiscControllerTest.php

@@ -91,7 +91,7 @@ public function testBalloonScoreboard(array $fixtures, bool $public, string $con
                 $elements = ["3 tries",'Demo contest','Utrecht University'];
             } elseif (in_array($contestStage, ['preEnd','preUnfreeze'])) {
                 $elements = ["0 + 4 tries","3 tries","2 + 1 tries",'Demo contest','Utrecht University'];
-                if ($contestStage === 'preFreeze') {
+                if ($contestStage === 'preUnfreeze') {
                     $elements[] = 'contest over, waiting for results';
                 }
             } else {