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68fee3e4 - docs: template readme update, fix docstring typo in a runnable (#24002)

docs: template readme update, fix docstring typo in a runnable (#24002) URL https://python.langchain.com/v0.2/docs/templates/openai-functions-tool-retrieval-agent/ Checklist I added a url - https://python.langchain.com/v0.2/docs/templates/openai-functions-agent/