Add new temperature sensors and swap the order of the existing ones

[syssi]

See #390

Can be tested using:

substitutions:
  external_components_source: github://syssi/esphome-jk-bms@add-new-temperature-sensors

+ extend the YAML configuration by the new sensors:

    temperature_sensor_3:
      name: "${name} temperature sensor 3"
    temperature_sensor_4:
      name: "${name} temperature sensor 4"