Wrong GMT time for America/Santiago

I noticed the GMT offset of `America/Santiago` should be `-03:00` instead of `-04:00` in JSON file:
```
{
	"label":"America/Santiago (GMT-04:00)",
	"tzCode":"America/Santiago",
	"name":"(GMT-04:00) Santiago, Puente Alto, Antofagasta, Viña del Mar, Valparaíso",
	"utc":"-04:00"
}
```