Fix migration references

aleksis/apps/alsijil/migrations/0020_documentation_extramark_colour_bg_and_more.py

@@ -8,9 +8,9 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('core', '0062_alter_freebusy_options_and_more'),
+        ('core', '0061_remove_group_additional_fields'),
         ('kolego', '0003_refactor_absence'),
-        ('cursus', '0004_alter_subject_colour_bg_alter_subject_colour_fg_and_more'),
+        ('cursus', '0003_drop_site'),
         ('alsijil', '0019_drop_sites'),
     ]