Heroku: Heroku renamed the included-spec fields for Postgres Premium-8 from disk_size and connection_limit to disk and connecti…

{"ram":"488 GB","disk_size":"3 TB","connection_limit":"500"} → {"ram":"488 GB","disk":"3 TB","connections":"500"}

Heroku renamed the included-spec fields for Postgres Premium-8 from disk_size and connection_limit to disk and connections. The values were unchanged at 488 GB RAM, 3 TB disk and 500 connections.