chore(deps): :arrow_up: Update devDependency postcss to v8.4.40

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss (source)	8.4.38 -> 8.4.40

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Release Notes

postcss/postcss (postcss)

### [`v8.4.40`](https://togithub.com/postcss/postcss/blob/HEAD/CHANGELOG.md#8440) [Compare Source](https://togithub.com/postcss/postcss/compare/8.4.39...8.4.40) - Moved to getter/setter in nodes types to help Sass team (by [@​nex3](https://togithub.com/nex3)). ### [`v8.4.39`](https://togithub.com/postcss/postcss/blob/HEAD/CHANGELOG.md#8439) [Compare Source](https://togithub.com/postcss/postcss/compare/8.4.38...8.4.39) - Fixed `CssSyntaxError` types (by [@​romainmenke](https://togithub.com/romainmenke)).

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Configuration

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🚦 Automerge: Enabled.

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

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Latest commit: 9fdf46b8466c4cf694bc007530c8699af0754066

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