build(deps): bump sass from 1.83.0 to 1.86.3 in /clients/ui/frontend

Bumps [sass](https://github.com/sass/dart-sass) from 1.83.0 to 1.86.3.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.83.0...1.86.3)

---
updated-dependencies:
- dependency-name: sass
  dependency-version: 1.86.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

clients/ui/frontend/package-lock.json

@@ -80,7 +80,7 @@
     "raw-loader": "^4.0.2",
     "react-refresh": "^0.14.2",
     "regenerator-runtime": "^0.14.1",
-    "sass": "^1.83.0",
+    "sass": "^1.86.3",
     "sass-loader": "^13.2.0",
     "serve": "^14.2.4",
     "speed-measure-webpack-plugin": "^1.5.0",
@@ -117,7 +117,7 @@
     "react-dom": "^18",
     "react-router": "^7.1.5",
     "react-router-dom": "^7.1.5",
-    "sass": "^1.83.0",
+    "sass": "^1.86.3",
     "showdown": "^2.1.0"
   },
   "optionalDependencies": {