Use `SourceType.ROUTER` in Tractive integration (#76071)

Use SourceType.ROUTER

homeassistant/components/tractive/device_tracker.py

@@ -57,6 +57,8 @@ class TractiveDeviceTracker(TractiveEntity, TrackerEntity):
         """Return the source type, eg gps or router, of the device."""
         if self._source_type == "PHONE":
             return SourceType.BLUETOOTH
+        if self._source_type == "KNOWN_WIFI":
+            return SourceType.ROUTER
         return SourceType.GPS
 
     @property