Merge pull request Significant-Gravitas#2183 from aminghani/fix-bug-i…

…moprt123

added missing import

autogpt/agent/agent_manager.py

@@ -1,6 +1,6 @@
 """Agent manager for managing GPT agents"""
 from __future__ import annotations
-
+from typing import Union
 from autogpt.llm_utils import create_chat_completion
 from autogpt.config.config import Singleton