Migrate discovery debouncer callback to async_fire_internal (#116078)

homeassistant/config_entries.py

@@ -1405,7 +1405,9 @@ class ConfigEntriesFlowManager(data_entry_flow.FlowManager[ConfigFlowResult]):
     @callback
     def _async_discovery(self) -> None:
         """Handle discovery."""
-        self.hass.bus.async_fire(EVENT_FLOW_DISCOVERED)
+        # async_fire_internal is used here because this is only
+        # called from the Debouncer so we know the usage is safe
+        self.hass.bus.async_fire_internal(EVENT_FLOW_DISCOVERED)
         persistent_notification.async_create(
             self.hass,
             title="New devices discovered",