minor bug fix

migrations/20221213-convert-shadowbanned-attribute-to-fkey.sql

@@ -1,3 +1,4 @@
+update users u set shadowbanned=(select id from users f where username=u.shadowbanned) where shadowbanned is not null;
 alter table users alter column shadowbanned type int using shadowbanned::integer;
 create index fki_user_shadowbanned_fkey on public.users using btree (shadowbanned);
 alter table only public.users add constraint user_shadowbanned_fkey foreign key (shadowbanned) references public.users(id);