Bump sass from 1.77.7 to 1.79.4

Bumps [sass](https://github.com/sass/dart-sass) from 1.77.7 to 1.79.4.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.77.7...1.79.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -14,7 +14,7 @@
     "dfe-frontend": "^2.0.1",
     "esbuild": "^0.21.5",
     "govuk-frontend": "^5.3.1",
-    "sass": "^1.77.6"
+    "sass": "^1.79.4"
   },
   "devDependencies": {
     "postcss": "8",