Postgres ALTER TABLE SET ( storage_parameter [= value] [, ... ] ) fails to parse

The following example is valid syntax (https://www.postgresql.org/docs/current/sql-altertable.html) but fails to parse:
```sql
ALTER TABLE your_table
SET (
  autovacuum_vacuum_scale_factor = 0.001,
  autovacuum_vacuum_threshold = 500
);
```