Update Historical Stats hourly retention
Added note about hourly data retention limits to the Historical Stats API documentation.
Prior change: Fastly Terraform Provider 4.3.1
Following change: Fastly Terraform Provider 4.3.2
Added note about hourly data retention limits to the Historical Stats API documentation.
Prior change: Fastly Terraform Provider 4.3.1
Following change: Fastly Terraform Provider 4.3.2