db/migrations: fix down in 003_events_admin to drop the new "admin" column, not the "relays" table (whoops)

src/db/migrations/003_events_admin.ts

@@ -8,5 +8,5 @@ export async function up(db: Kysely<any>): Promise<void> {
 }
 
 export async function down(db: Kysely<any>): Promise<void> {
-  await db.schema.dropTable('relays').execute();
+  await db.schema.alterTable('users').dropColumn('admin').execute();
 }