chore(deps): update dependency openai to v1.35.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
openai	==1.35.8 -> ==1.35.9

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Release Notes

openai/openai-python (openai)

### [`v1.35.9`](https://togithub.com/openai/openai-python/blob/HEAD/CHANGELOG.md#1359-2024-07-02) [Compare Source](https://togithub.com/openai/openai-python/compare/v1.35.8...v1.35.9) Full Changelog: [v1.35.8...v1.35.9](https://togithub.com/openai/openai-python/compare/v1.35.8...v1.35.9) ##### Bug Fixes - **client:** always respect content-type multipart/form-data if provided ([#​1519](https://togithub.com/openai/openai-python/issues/1519)) ([6da55e1](https://togithub.com/openai/openai-python/commit/6da55e10c4ba8c78687baedc68d5599ea120d05c)) ##### Chores - minor change to tests ([#​1521](https://togithub.com/openai/openai-python/issues/1521)) ([a679c0b](https://togithub.com/openai/openai-python/commit/a679c0bd1e041434440174daa7a64289746856d1))

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