Change state attribute naming (based on 2021.12 deprecation)

[HarrisonPace]

Remove deprecated "device_state_attributes" property in favor of "extra_state_attributes".

Fixes Log Warnings produced in Home Assistant 2021.12+

This is unlikely to cause issues for users running older versions of Home Assistant, (unless it's older than 2021.4). https://github.com/home-assistant/core/pull/47304