Bump sass-loader from 14.2.1 to 15.0.0

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 14.2.1 to 15.0.0.
- [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@v14.2.1...v15.0.0)

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

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

package.json

@@ -61,7 +61,7 @@
     "prettier": "^3.1.1",
     "process": "^0.11.10",
     "sass": "^1.69.5",
-    "sass-loader": "^14.0.0",
+    "sass-loader": "^15.0.0",
     "sinon": "^18.0.0",
     "stylelint": "^16.0.2",
     "stylelint-config-takiyon": "^4.0.0",