chore: upgrade phpunit to 12.5

tests/Menu/TeamerMenuBackItemTest.php

@@ -58,9 +58,8 @@ class TeamerMenuBackItemTest extends KernelTestCase
     /**
      * The regression guard: reachable e.g. after the status update in
      * Admin\Teamer\SkillsController, which redirects without carrying "r" forward.
-     *
-     * @dataProvider builderProvider
      */
+    #[\PHPUnit\Framework\Attributes\DataProvider('builderProvider')]
     public function testWithoutAnyReturnUrlTheOverviewIsLinked(string $builderClass): void
     {
         $this->pushRequest();