chore(deps) Update dependency gulp-autoprefixer to v9 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
gulp-autoprefixer	8.0.0 -> 9.0.0

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Release Notes

sindresorhus/gulp-autoprefixer (gulp-autoprefixer)

### [`v9.0.0`](https://togithub.com/sindresorhus/gulp-autoprefixer/releases/tag/v9.0.0) [Compare Source](https://togithub.com/sindresorhus/gulp-autoprefixer/compare/v8.0.0...v9.0.0) ##### Breaking - Require Node.js 18 [`66cef58`](https://togithub.com/sindresorhus/gulp-autoprefixer/commit/66cef58) - This package is now pure ESM. **Please [read this](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).**

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Configuration

📅 Schedule: Branch creation - "before 10pm on Sunday" in timezone America/Chicago, Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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