Fix migration history

aleksis/apps/chronos/migrations/0014_lessonevent.py

@@ -7,7 +7,7 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
     dependencies = [
         ("sites", "0002_alter_domain_unique"),
-        ("core", "0054_calendarevent_timezone"),
+        ("core", "0051_calendarevent_and_holiday"),
         ("cursus", "0001_initial"),
         ("chronos", "0013_move_room_to_core"),
     ]