Heroku: Heroku replaced 'High Availability' with 'Zero-downtime scaling' in the Postgres Advanced 16G-Performance feature list,…

["Pay only for what you use","Decoupled storage and compute","High Availability"] → ["Pay only for what you use","Decoupled storage and compute","Zero-downtime scaling"]

Heroku replaced 'High Availability' with 'Zero-downtime scaling' in the Postgres Advanced 16G-Performance feature list, which removed the listed High Availability.