Bump sass-loader from 14.2.0 to 14.2.1 in /frontend

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 14.2.0 to 14.2.1.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/sass-loader@v14.2.0...v14.2.1)

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

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

frontend/package.json

@@ -83,7 +83,7 @@
     "pinia": "^2.1.7",
     "pinia-plugin-persistedstate": "^3.2.1",
     "sass": "^1.75.0",
-    "sass-loader": "^14.2.0",
+    "sass-loader": "^14.2.1",
     "sirv": "^2.0.4",
     "ts-node": "^10.9.2",
     "typescript": "^5.4.5",