chore: upgrade phpunit to 12.5

tests/Service/Season/SeasonChecklistStatusTest.php

@@ -22,7 +22,7 @@ class SeasonChecklistStatusTest extends TestCase
 
     protected function setUp(): void
     {
-        $this->builder = new SeasonChecklistBuilder($this->createMock(SeasonTaskDeadlineResolver::class));
+        $this->builder = new SeasonChecklistBuilder($this->createStub(SeasonTaskDeadlineResolver::class));
     }
 
     public function testItIsOpenWhileAnEntryRequiringAReturnIsOpen(): void