chore(deps): update dependency tiktoken to v0.5.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
tiktoken (changelog)	==0.5.1 -> ==0.5.2

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Release Notes

openai/tiktoken (tiktoken)

### [`v0.5.2`](https://togithub.com/openai/tiktoken/blob/HEAD/CHANGELOG.md#v052) [Compare Source](https://togithub.com/openai/tiktoken/compare/0.5.1...0.5.2) - Build wheels for Python 3.12 - Update version of PyO3 to allow multiple imports - Avoid permission errors when using default cache logic

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