Offline detection for Z2M devices with last_seen

The warning part, read this…
{{ result.sensors | join(', ') }}' but no default was specified. Currently 'strptime' will return '2022-01-29T17:30:49.295Z', however this template will fail to render in Home Assistant core 2022.1

@Mr_Groch

It’s a deprecated thing that will, I assume, become a breaking change…