chore(deps): update dependency furo to v2024.5.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
furo	==2024.4.27 -> ==2024.5.6

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Release Notes

pradyunsg/furo (furo)

### [`v2024.5.6`](https://togithub.com/pradyunsg/furo/compare/2024.04.27...2024.05.06) [Compare Source](https://togithub.com/pradyunsg/furo/compare/2024.04.27...2024.05.06)

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