chore(deps): update dependency remark-rehype to v11

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
remark-rehype	~10.1.0 -> ~11.0.0

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Release Notes

remarkjs/remark-rehype (remark-rehype)

### [`v11.0.0`](https://togithub.com/remarkjs/remark-rehype/releases/tag/11.0.0) [Compare Source](https://togithub.com/remarkjs/remark-rehype/compare/10.1.0...11.0.0) ##### Change - [`30091c7`](https://togithub.com/remarkjs/remark-rehype/commit/30091c7) Change to require Node.js 16 **migrate**: update too - [`cafeacc`](https://togithub.com/remarkjs/remark-rehype/commit/cafeacc) Change to use `exports` **migrate**: don’t use private APIs - [`acb292a`](https://togithub.com/remarkjs/remark-rehype/commit/acb292a) Update `mdast-util-to-hast`, `@types/{hast,mdast}`, unified, etc **migrate**: update too if you don’t use handlers, this should be fine; if you do, see [`mdast-util-to-hast@13.0.0`](https://togithub.com/syntax-tree/mdast-util-to-hast/releases/tag/13.0.0) - [`ba50965`](https://togithub.com/remarkjs/remark-rehype/commit/ba50965) Remove `Processor` type **migrate**: get it from `unified` ##### Add - [`b990986`](https://togithub.com/remarkjs/remark-rehype/commit/b990986) Add exports of `defaultFootnoteBackContent`, `defaultFootnoteBackLabel` **Full Changelog**: https://github.com/remarkjs/remark-rehype/compare/10.1.0...11.0.0

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