Fix tado climate service (#112686)

homeassistant/components/tado/climate.py

@@ -401,9 +401,9 @@ class TadoClimate(TadoZoneEntity, ClimateEntity):
 
     def set_timer(
         self,
-        temperature: float,
+        temperature: float | None = None,
-        time_period: int,
+        time_period: int | None = None,
-        requested_overlay: str,
+        requested_overlay: str | None = None,
     ):
         """Set the timer on the entity, and temperature if supported."""