chore(deps): update dependency openai to v1.40.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
openai	==1.40.3 -> ==1.40.4

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Release Notes

openai/openai-python (openai)

### [`v1.40.4`](https://togithub.com/openai/openai-python/blob/HEAD/CHANGELOG.md#1404-2024-08-12) [Compare Source](https://togithub.com/openai/openai-python/compare/v1.40.3...v1.40.4) Full Changelog: [v1.40.3...v1.40.4](https://togithub.com/openai/openai-python/compare/v1.40.3...v1.40.4) ##### Bug Fixes - **json schema:** unravel `$ref`s alongside additional keys ([c7a3d29](https://togithub.com/openai/openai-python/commit/c7a3d2986acaf3b31844b39608d03265ad87bb04)) - **json schema:** unwrap `allOf`s with one entry ([53d964d](https://togithub.com/openai/openai-python/commit/53d964defebdf385d7d832ec7f13111b4af13c27))

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