fix(deps): update dependency @sapphire/utilities to ^3.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@sapphire/utilities	^3.8.0 -> ^3.9.0

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Release Notes

sapphiredev/utilities

### [`v3.9.0`](https://togithub.com/sapphiredev/utilities/blob/HEAD/packages/utilities/CHANGELOG.md#sapphireutilities390-httpsgithubcomsapphiredevutilitiescomparesapphireutilities380sapphireutilities390---2022-08-04) [Compare Source](https://togithub.com/sapphiredev/utilities/compare/@sapphire/utilities@3.8.0...@sapphire/utilities@3.9.0) #### 🚀 Features - **utilities:** Add getDeepObjectKeys ([#​413](https://togithub.com/sapphiredev/utilities/issues/413)) ([b8b0883](https://togithub.com/sapphiredev/utilities/commit/b8b0883689e96df30767e4c9998b5f3403560779))

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