Closes #5059 (#5156)

Update _magentic_one_orchestrator.py

In a Magentic Group Settting, if one of the Assitant Agents uses a tool it gives the following error, note this is under a FALSE reflect_on_tool variable.

Making it true, wont happen, though more tokens will be consumed and it will have a worst output and the philosophy of a tool as an answer is not followed...

python/packages/autogen-agentchat/src/autogen_agentchat/teams/_group_chat/_magentic_one/_magentic_one_orchestrator.py

@@ -460,7 +460,7 @@ def _thread_to_context(self) -> List[LLMMessage]:
                 assert isinstance(m, TextMessage | ToolCallSummaryMessage)
                 context.append(AssistantMessage(content=m.content, source=m.source))
             else:
-                assert isinstance(m, TextMessage) or isinstance(m, MultiModalMessage)
+                assert isinstance(m, (TextMessage, MultiModalMessage, ToolCallSummaryMessage))
                 context.append(UserMessage(content=m.content, source=m.source))
         return context