If the date of birth is wrong on your booking, it does not matter as long as it is within the age category of the flight ticket.
For example:
It is not a problem if an adult flight ticket was booked and the person is still an adult.
It is a problem if a child flight ticket (2-11 years old) was booked by mistake instead of an adult flight ticket.
It is a problem if an infant flight ticket (0-1 years old) was booked by mistake instead of a child flight ticket.
Please double-check that the age category on your booking matches the traveller’s actual age.