Change Python's ObjectID to ObjectRef (#9353)

python/ray/serve/handle.py

@@ -20,7 +20,7 @@ class RayServeHandle:
             Traffic=...
        )
        >>> handle.remote(my_request_content)
-       ObjectID(...)
+       ObjectRef(...)
        >>> ray.get(handle.remote(...))
        # result
        >>> ray.get(handle.remote(let_it_crash_request))

python/ray/serve/router.py

@@ -198,7 +198,7 @@ class Router:
             self.endpoint_queues[endpoint].appendleft(query)
             self.flush_endpoint_queue(endpoint)
 
-        # Note: a future change can be to directly return the ObjectID from
+        # Note: a future change can be to directly return the ObjectRef from
         # replica task submission
         try:
             result = await query.async_future