feat: Update dependency alex to v9

[renovate[bot]]

This PR contains the following updates:

Package	Update	Type	Change	CompatibilityScore	Sourcegraph
alex (source)	major	dependencies	^8.2.0 -> ^9.0.1

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Release Notes

get-alex/alex

### [`v9.0.1`](https://togithub.com/get-alex/alex/releases/9.0.1) [Compare Source](https://togithub.com/get-alex/alex/compare/9.0.0...9.0.1) - [`74345ad`](https://togithub.com/get-alex/alex/commit/74345ad) Fix `deny` on cli ### [`v9.0.0`](https://togithub.com/get-alex/alex/releases/9.0.0) [Compare Source](https://togithub.com/get-alex/alex/compare/8.2.0...9.0.0) - [`651bad7`](https://togithub.com/get-alex/alex/commit/651bad7) Update contributors - [`3894be8`](https://togithub.com/get-alex/alex/commit/3894be8) Add MDX support - [`13c870a`](https://togithub.com/get-alex/alex/commit/13c870a) Update dependencies - lots of changes to patterns in `retext-equality`, `retext-profanities` - bunch of other fixes in deps!

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