[upd] web-client (simple): Bump less (#6289)

Bumps the minor group in /client/simple with 1 update: [less](https://github.com/less/less.js).


Updates `less` from 4.6.4 to 4.6.6
- [Release notes](https://github.com/less/less.js/releases)
- [Changelog](https://github.com/less/less.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/less/less.js/commits/v4.6.6)

---
updated-dependencies:
- dependency-name: less
  dependency-version: 4.6.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor
...

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

client/simple/package.json

@@ -34,7 +34,7 @@
     "browserslist": "^4.28.2",
     "browserslist-to-esbuild": "^2.1.1",
     "edge.js": "^6.5.1",
-    "less": "^4.6.4",
+    "less": "^4.6.6",
     "mathjs": "^15.2.0",
     "sharp": "~0.35.1",
     "sort-package-json": "^4.0.0",