fix: run the functional tests over https

tests/Controller/Admin/BookingAdminControllerTest.php

@@ -26,7 +26,7 @@ class BookingAdminControllerTest extends WebTestCase
 
     protected function setUp(): void
     {
-        $this->client = self::createClient();
+        $this->client = self::createClient(server: ['HTTPS' => true]);
         $this->client->disableReboot();
         $this->em = self::getContainer()->get(EntityManagerInterface::class);
         $this->em->getConnection()->beginTransaction();
@@ -231,7 +231,7 @@ class BookingAdminControllerTest extends WebTestCase
         self::assertStringContainsString('Bea Berger', $modal->text());
         // Posts back to the same URI, which is what carries ?return=admin through the round trip.
         self::assertSame(
-            \sprintf('http://localhost/bookings/%d/release?return=admin', $booking->getId()),
+            \sprintf('https://localhost/bookings/%d/release?return=admin', $booking->getId()),
             $modal->filter('[hx-post]')->attr('hx-post'),
         );
     }