the document of `url()` is wrong

I copy the example from https://community-extensions.duckdb.org/extensions/chsql.html
```sql
D SELECT url('https://urleng.com/test','JSON');
Binder Error: Function "url" is a table function but it was used as a scalar function. This function has to be called in a FROM clause (similar to a table).
LINE 1: SELECT url('https://urleng.com/test','JSON');
               ^
```