Use correct suffix for elevation

[ludeeus]

Fixes #4452

[waded]

As I understand it the core config is stored in meters. (https://www.home-assistant.io/docs/configuration/basic/) Could someone help me see how this change would not lead to stored config value, as used by other components, being misinterpreted by a factor >3 if entered in feet? Where does conversion happen before it lands in config and is used by components? I looked, but I didn't see anything code like that.

As I mentioned in #4452, I would think you'd need to convert at the UI layer if you want to allow/display input in feet here, given the rest of the stack. It doesn't seem as simple to me as just changing the label, and that isn't what I was asking for.

[bramkragten]

I think he is right, elevation in Home Assistant is always in meters. So it should be converted on save, fetch and change of the unit system to be correct with the label.