[Bug] [Doc] The example in the conversation history tutorial is lightly wrong

[zhiyanliu]

What happened?

At [0], the user message in the example actually is America. This helps reduce ambiguity for readers.

[0] https://github.com/stanfordnlp/dspy/blob/main/docs/docs/tutorials/conversation_history/index.md?plain=1#L198-L206

Steps to reproduce

Open official doc at website at here.

DSPy version

3.0.4