Update appointment.csv

appointment.csv

@@ -1,3 +1,3 @@
-id,patient_username,doctor_username,requested_time,approved_time,status
-1,patient1,doctor1,2024-08-15 09:00:00,2024-08-15 10:00:00,approved
-2,patient1,doctor1,2024-08-16 11:00:00,,pending
+appointment_id,patient_id,doctor_id,requested_time,approved_time,status
+1,2,1,2024-08-15 10:00:00,2024-08-15 11:00:00,approved
+2,2,1,2024-08-20 09:00:00,,pending