Update model for one notebook that specified `gpt-4`. Otherwise just updating cassettes. --------- Co-authored-by: Jacob Lee <jacoblee93@gmail.com> Co-authored-by: Bagatur <baskaryan@gmail.com>
Add how-to guides to [Run notebooks job](https://github.com/langchain-ai/langchain/actions/workflows/run_notebooks.yml) and fix existing notebooks. - As with tutorials, cassettes must be updated when HTTP calls in guides change (by running existing [script](https://github.com/langchain-ai/langchain/blob/master/docs/scripts/update_cassettes.sh)). - Cassettes now total ~62mb over 474 files. - `docs/scripts/prepare_notebooks_for_ci.py` lists a number of notebooks that do not run (e.g., due to requiring additional infra, slowness, requiring `input()`, etc.).
