feat: upgrade phpunit to 12.5

tests/Service/BookingEditContextFactoryTest.php

@@ -32,7 +32,7 @@ class BookingEditContextFactoryTest extends TestCase
         $bookingData = new Booking();
         $bookingData->dateId = 123;
 
-        $summaryData = $this->createMock(BookingSummaryDto::class);
+        $summaryData = $this->createStub(BookingSummaryDto::class);
 
         $participantCardAssembler = $this->createMock(ParticipantCardAssembler::class);
         $participantCardAssembler->expects($this->once())