Clarify automatic creation of inactive statuses is for same environment

[bradymholt]

What is the current behavior?

The Inactive deployments section of the REST Reference docs mentions:

When you set the state of a deployment to success, then all prior non-transient, non-production environment deployments in the same repository will become inactive.

But, this only happens for previous deployments with the same environment name, as noted in this Changelog: https://developer.github.com/changes/2016-04-06-deployment-and-deployment-status-enhancements/#automatic-creation-of-inactive-statuses

What changes are you suggesting?

Clarify that automatic creation of inactive statuses is made to deployments with the same environment name.

Additional information

(none)

[chiedo]

@janiceilene this looks like a content change!