chore(deps): update dependency stylelint-scss to v6.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
stylelint-scss	6.5.1 -> 6.6.0

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Release Notes

stylelint-scss/stylelint-scss (stylelint-scss)

### [`v6.6.0`](https://redirect.github.com/stylelint-scss/stylelint-scss/blob/HEAD/CHANGELOG.md#660) [Compare Source](https://redirect.github.com/stylelint-scss/stylelint-scss/compare/v6.5.1...v6.6.0) - Added: `declaration-property-value-no-unknown`: add support for first-class operators ([#​1042](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1042)). - Added: `declaration-property-value-no-unknown`: add support SCSS variables as arguments in nested functions ([#​1042](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1042)). **Full Changelog**: https://github.com/stylelint-scss/stylelint-scss/compare/v6.5.1...v6.6.0

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