Update dependency rehype-slug to v5 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rehype-slug	4.0.1 -> 5.0.0

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Release Notes

rehypejs/rehype-slug

### [`v5.0.0`](https://togithub.com/rehypejs/rehype-slug/releases/5.0.0) [Compare Source](https://togithub.com/rehypejs/rehype-slug/compare/4.0.1...5.0.0) - [`821be93`](https://togithub.com/rehypejs/rehype-slug/commit/821be93) Use ESM - Change: ```js // From CommonJS var rehypeSlug = require('rehype-slug') // To ESM import rehypeSlug from 'rehype-slug' ``` Learn [more about ESM in this guide](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c) - [`b293ef3`](https://togithub.com/rehypejs/rehype-slug/commit/b293ef3) Add JSDoc based types - [`4e8a681`](https://togithub.com/rehypejs/rehype-slug/commit/4e8a681) Update dependencies

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