Heroku: Heroku removed 'Dedicated runtime environment' from the Private-M Dyno feature list.

["Includes all Performance features","Full network isolation","Dedicated runtime environment","Private Space required"] → ["Includes all Performance features","Full network isolation","Private Space required"]

Heroku removed 'Dedicated runtime environment' from the Private-M Dyno feature list. The other three listed features (Performance features, full network isolation, Private Space required) were unchanged.