fix: Fix closed connection issue on reset button (#175)

langchain_tools_demo/agent.py

@@ -94,6 +94,7 @@ async def handle_error_response(response):
 async def create_client_session() -> aiohttp.ClientSession:
     return aiohttp.ClientSession(
         connector=await get_connector(),
+        connector_owner=False,  # Prevents connector being closed when closing session
         headers=get_header(),
         raise_for_status=handle_error_response,
     )