Improve patching for nzbget sensor tests (#41032)

tests/components/nzbget/test_sensor.py

@@ -17,7 +17,7 @@ from tests.async_mock import patch
 async def test_sensors(hass, nzbget_api) -> None:
     """Test the creation and values of the sensors."""
     now = dt_util.utcnow().replace(microsecond=0)
-    with patch("homeassistant.util.dt.utcnow", return_value=now):
+    with patch("homeassistant.components.nzbget.sensor.utcnow", return_value=now):
         entry = await init_integration(hass)
 
     registry = await hass.helpers.entity_registry.async_get_registry()