Add entity category to gogogate2 (#58366)

homeassistant/components/gogogate2/sensor.py

@@ -10,6 +10,7 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     TEMP_CELSIUS,
 )
 from homeassistant.core import HomeAssistant
@@ -51,6 +52,8 @@ async def async_setup_entry(
 class DoorSensorBattery(GoGoGate2Entity, SensorEntity):
     """Battery sensor entity for gogogate2 door sensor."""
 
+    _attr_entity_category = ENTITY_CATEGORY_DIAGNOSTIC
+
     def __init__(
         self,
         config_entry: ConfigEntry,