Bump less from 4.4.2 to 4.5.1 (#24262)

Bumps [less](https://github.com/less/less.js) from 4.4.2 to 4.5.1.
- [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)

---
updated-dependencies:
- dependency-name: less
  dependency-version: 4.5.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -29,7 +29,7 @@
     "jquery.browser": "0.1.0",
     "jquery.cookie": "1.4.1",
     "jszip": "3.10.1",
-    "less": "4.4.2",
+    "less": "4.5.1",
     "netmask": "2.0.2",
     "source-map": "0.7.6",
     "timeago.js": "^4.0.2",