Fix migration history

(cherry picked from commit 33bd4d91)

aleksis/core/migrations/0021_public_favicon.py → aleksis/core/migrations/0022_public_favicon.py

@@ -8,7 +8,7 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('core', '0020_pdf_file_person_optional'),
+        ('core', '0021_drop_persons_accounts_perm'),
         ('favicon', '0004_faviconimg_favicon_size_rel_unique'),
     ]