fix: await gather_endpoints coroutine

jina/serve/runtimes/gateway/request_handling.py

@@ -3,8 +3,8 @@
 from typing import TYPE_CHECKING, Callable, List, Optional, Tuple
 
 import grpc.aio
-
 from docarray import DocumentArray
+
 from jina.excepts import InternalNetworkError
 from jina.helper import GATEWAY_NAME
 from jina.logging.logger import JinaLogger
@@ -147,7 +147,7 @@ async def _process_results_at_end_gateway(
                         and not self._gathering_endpoints
                     ):
                         self._gathering_endpoints = True
-                        asyncio.create_task(gather_endpoints(request_graph))
+                        await asyncio.create_task(gather_endpoints(request_graph))
 
                     partial_responses = await asyncio.gather(*tasks)
                 except Exception: