fix(deps): update dependency stylelint-scss to v6.8.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
stylelint-scss	6.7.0 -> 6.8.0

---

Release Notes

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

### [`v6.8.0`](https://redirect.github.com/stylelint-scss/stylelint-scss/blob/HEAD/CHANGELOG.md#680) [Compare Source](https://redirect.github.com/stylelint-scss/stylelint-scss/compare/v6.7.0...v6.8.0) - Added: `function-color-channel` rule ([#​1060](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1060)). - Added: `selector-no-redundant-nesting-selector` support for Dart Sass deprecation ([#​1022](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1022)). - Fixed: `declaration-property-value-no-unknown` include explicit namespace variables in `isDollarVar()` ([#​1062](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1062)). - Fixed: `declaration-property-value-no-unknown` fix false positives for imported custom functions ([#​1061](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1061)). - Fixed: `declaration-property-value-no-unknown` reported ranges and message ([stylelint/stylelint#8003](https://redirect.github.com/stylelint/stylelint/pull/8003), [#​1066](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1066)). - Fixed: `declaration-property-value-no-unknown` false negatives/positives via [`css-tree@3.0.0`](https://redirect.github.com/csstree/csstree/releases/tag/v3.0.0) ([stylelint/stylelint#7993](https://redirect.github.com/stylelint/stylelint/pull/7993), [#​1065](https://redirect.github.com/stylelint-scss/stylelint-scss/issues/1065)). **Full Changelog**: https://github.com/stylelint-scss/stylelint-scss/compare/v6.7.0...v6.8.0

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

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

---

This PR was generated by Mend Renovate. View the repository job log.