fix: incorrect nesting of return statement

src/BusProNet/Model/Booking.php

@@ -94,9 +94,9 @@ class Booking
             if (in_array($participantIndex, $room->mapping)) {
                 return $room;
             }
-
-            return null;
         }
+
+        return null;
     }
 
     public function getPriceForParticipant(int $participantIndex): float