The temperature property should be optional in SetZoneOverlaysArg for hot water control

[thoukydides]

The current SetZoneOverlaysArg type requires a temperature to be specified. However, if this is done for a BU01 Extension Kit HOT_WATER zone:

POST 'https://my.tado.com/api/v2/homes/XXX/overlay
{"overlays":[{"overlay":{"setting":{"type":"HOT_WATER","isBoost":false,"power":"ON","temperature":{"celsius":60}},"termination":{"typeSkillBasedApp":"NEXT_TIME_BLOCK"}},"room":0}]}

the Tado API returns a 422 error with:

      errors: [
        {
          code: 'setting.notSupported',
          title: 'temperature not allowed'
        }
      ]

Omitting the temperature property works as expected.

It looks like the deprecated setZoneOverlay method supported this, but it is currently necessary to violate the Typescript type with the setZoneOverlays method.