Sensor.uptime: add timestamp value as attribute to allow translation

Feature Requests
1

Maybe Team can considered to add the timestamp format to uptime so it will show in current language.
My template:

- platform: template
  sensors:
    custom_ha_last_boot:
      friendly_name: HA ultimo riavvio
      entity_id: sensor.uptime
      device_class: timestamp
      value_template: "{{ (as_timestamp(now()) - (states('sensor.ha_uptime') | float ) *60*60) | timestamp_custom('%Y-%m-%dT%H:%M', true) }}"

NB: Math formula is based on hours as unit_of_measurement for sensor_ha_uptime

and this is the result in UI:

image

Simone