Bump sass from 1.77.4 to 1.77.6

Bumps [sass](https://github.com/sass/dart-sass) from 1.77.4 to 1.77.6.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.77.4...1.77.6)

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

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

package.json

@@ -13,7 +13,7 @@
   "license": "MIT",
   "devDependencies": {
     "@types/robust-point-in-polygon": "^1.0.0",
-    "sass": "^1.77.4",
+    "sass": "^1.77.6",
     "ts-loader": "^9.5.0",
     "tslint": "^6",
     "typescript": "^4.9.5",