Bump sass from 1.90.0 to 1.91.0

Bumps [sass](https://github.com/sass/dart-sass) from 1.90.0 to 1.91.0.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.90.0...1.91.0)

---
updated-dependencies:
- dependency-name: sass
  dependency-version: 1.91.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "eslint": "9.33.0",
     "eslint-config-next": "15.5.0",
     "postcss": "8.5.6",
-    "sass": "1.90.0",
+    "sass": "1.91.0",
     "typescript": "5.9.2"
   },
   "dependencies": {