build(deps): bump less from 3.13.1 to 4.0.0 in /web

Bumps [less](https://github.com/less/less.js) from 3.13.1 to 4.0.0.
- [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/compare/v3.13.1...v4.0.0)

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

web/package.json

@@ -16,7 +16,7 @@
     "customize-cra": "^1.0.0",
     "eslint-config-prettier": "^7.1.0",
     "eslint-plugin-prettier": "^3.3.1",
-    "less": "^3.13.1",
+    "less": "^4.0.0",
     "less-loader": "^7.2.1",
     "prettier": "^2.2.1",
     "react": "^17.0.1",