configuration option gives an error

[pvklink]

This is one of the Zigbee2MQTT 2.0.0 breaking changes, from Koenkk/zigbee2mqtt#24198

• All action sensors are now disabled by default (sensor.*_action entities). It's recommended to use the MQTT device trigger instead. In case you really need the action sensors, add the following to your configuration.yaml.

  homeassistant:
  
    legacy_action_sensor: true
  

Originally posted by @Koenkk in #685

This option in the configurationfile gives an error
Invalid config for 'homeassistant' at configuration.yaml, line 8: 'legacy_action_sensor' is an invalid option for 'homeassistant', check: legacy_action_sensor