chore(deps): update dependency slug to v9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
slug	^8.2.2 -> ^9.0.0

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Release Notes

Trott/slug (slug)

### [`v9.0.0`](https://togithub.com/Trott/slug/blob/HEAD/CHANGELOG.md#900-2024-03-07) [Compare Source](https://togithub.com/Trott/slug/compare/v8.2.3...v9.0.0) ##### chore - refresh package-lock.json ([#​426](https://togithub.com/Trott/slug/issues/426)) ([c86632c](https://togithub.com/Trott/slug/commit/c86632cfc1c1254ac026fd8a29acf28fe2ea59a1)) ##### BREAKING CHANGES - Drop support for Node.js older than 18.x #### [8.2.3](https://togithub.com/Trott/slug/compare/v8.2.2...v8.2.3) (2023-07-18) ##### Bug Fixes - fix output example in README ([#​393](https://togithub.com/Trott/slug/issues/393)) ([3165852](https://togithub.com/Trott/slug/commit/3165852d527737bbfaac8ab3f18b2868665024b6)) #### [8.2.2](https://togithub.com/Trott/slug/compare/v8.2.1...v8.2.2) (2022-10-02) ##### Bug Fixes - slugify θ as th ([#​354](https://togithub.com/Trott/slug/issues/354)) ([19e8ca1](https://togithub.com/Trott/slug/commit/19e8ca111453988d15a09572b8fd3b5336822cd4)) #### [8.2.1](https://togithub.com/Trott/slug/compare/v8.2.0...v8.2.1) (2022-10-02) ##### Bug Fixes - use correct path for CLI ([#​352](https://togithub.com/Trott/slug/issues/352)) ([f163bd2](https://togithub.com/Trott/slug/commit/f163bd2be141390358b52fa80261d66dfe5ed71d))

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