Adjust type hints in wilight config_flow (#127107)

homeassistant/components/wilight/config_flow.py

@@ -25,11 +25,12 @@ class WiLightFlowHandler(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
+    _title: str
+
     def __init__(self) -> None:
         """Initialize the WiLight flow."""
         self._host = None
         self._serial_number = None
-        self._title = None
         self._model_name = None
         self._wilight_components: list[str] = []
         self._components_text = ""