dep-up: 📦 Update dependency postcss-scss to ^4.0.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-scss	^4.0.5 -> ^4.0.6

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Release Notes

postcss/postcss-scss

### [`v4.0.6`](https://togithub.com/postcss/postcss-scss/blob/HEAD/CHANGELOG.md#​406) [Compare Source](https://togithub.com/postcss/postcss-scss/compare/4.0.5...4.0.6) - Fixed comma parsing (by Jerome Leclanche).

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