chore: upgrade phpunit to 12.5

tests/Validator/Constraints/ResolvableHotelValidatorTest.php

@@ -84,7 +84,7 @@ class ResolvableHotelValidatorTest extends ConstraintValidatorTestCase
      */
     private function provider(array $hotels): object
     {
-        $provider = $this->createMock(HotelDataProvider::class);
+        $provider = $this->createStub(HotelDataProvider::class);
         $provider->method('getAll')->willReturn($hotels);
 
         return $provider;