Update README.md (#19172)

Thank you for contributing to LangChain!

- [ ] **PR title**: "package: description"
- Where "package" is whichever of langchain, community, core,
experimental, etc. is being modified. Use "docs: ..." for purely docs
changes, "templates: ..." for template changes, "infra: ..." for CI
changes.
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- [ ] **PR message**: ***Delete this entire checklist*** and replace
with
    - **Description:** a description of the change
    - **Issue:** the issue # it fixes, if applicable
    - **Dependencies:** any dependencies required for this change
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mention, we'll gladly shout you out!


- [ ] **Add tests and docs**: If you're adding a new integration, please
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1. a test for the integration, preferably unit tests that do not rely on
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2. an example notebook showing its use. It lives in
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- [ ] **Lint and test**: Run `make format`, `make lint` and `make test`
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Additional guidelines:
- Make sure optional dependencies are imported within a function.
- Please do not add dependencies to pyproject.toml files (even optional
ones) unless they are required for unit tests.
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If no one reviews your PR within a few days, please @-mention one of
baskaryan, efriis, eyurtsev, hwchase17.

templates/openai-functions-tool-retrieval-agent/README.md

@@ -36,7 +36,7 @@ langchain app add openai-functions-tool-retrieval-agent
 
 And add the following code to your `server.py` file:
 ```python
-from openai_functions_tool_retrieval_agent import chain as openai_functions_tool_retrieval_agent_chain
+from openai_functions_tool_retrieval_agent import agent_executor as openai_functions_tool_retrieval_agent_chain
 
 add_routes(app, openai_functions_tool_retrieval_agent_chain, path="/openai-functions-tool-retrieval-agent")
 ```
@@ -71,4 +71,4 @@ We can access the template from code with:
 from langserve.client import RemoteRunnable
 
 runnable = RemoteRunnable("http://localhost:8000/openai-functions-tool-retrieval-agent")
-```
+```