Fix bond update delaying shutdown when push updated are not available (#116344)

If push updates are not available, bond could delay shutdown. The update
task should have been marked as a background task

homeassistant/components/bond/entity.py

@@ -128,7 +128,9 @@ class BondEntity(Entity):
                 _FALLBACK_SCAN_INTERVAL,
             )
             return
-        self.hass.async_create_task(self._async_update(), eager_start=True)
+        self.hass.async_create_background_task(
+            self._async_update(), f"{DOMAIN} {self.name} update", eager_start=True
+        )
 
     async def _async_update(self) -> None:
         """Fetch via the API."""