chore(deps-dev): bump less-loader from 11.1.4 to 12.1.0 (#4776)

Bumps [less-loader](https://github.com/webpack-contrib/less-loader) from 11.1.4 to 12.1.0.
- [Release notes](https://github.com/webpack-contrib/less-loader/releases)
- [Changelog](https://github.com/webpack-contrib/less-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/less-loader@v11.1.4...v12.1.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -141,7 +141,7 @@
  "jsdom-global": "3.0.2",
  "json-loader": "0.5.7",
  "less": "^4.1.3",
- "less-loader": "^11.0.0",
+ "less-loader": "^12.1.0",
  "license-checker": "^25.0.0",
  "lint-staged": "^15.0.2",
  "local-web-server": "=5.3.1",