MQTT breaking changes RC 2022.6

got it!
configuration.yaml:

mqtt:
  sensor: !include_dir_merge_list mqtt/
sensor: !include_dir_merge_list sensors

mqtt/humidity.yaml

- name: "Indoor Humidity"
#'acurite/humidity'
  state_topic: "home/rtl_433"
  unit_of_measurement: '%'
  ....