Update AQI breakpoints

[richli]

trafficstars

I noticed that recently the US EPA updated the AQI formula. They changed a few of the breakpoints, such as lowering the first PM 2.5 bin from 12 μg/m³ to 9 μg/m³.

The AQI calculation in files such as sensor_pms5003.yaml cites the Wikipedia page for AQI, and it has already been updated with the changes.

[MallocArray]

Thank you. I wasn't aware of the update.

Looking at it.

[MallocArray]

Testing now https://github.com/MallocArray/airgradient_esphome/pull/76

[MallocArray]

Included in the 4.0.5 release