Bump grunt-contrib-less from 0.6.5 to 3.0.0 in /js

Bumps [grunt-contrib-less](https://github.com/gruntjs/grunt-contrib-less) from 0.6.5 to 3.0.0.
- [Release notes](https://github.com/gruntjs/grunt-contrib-less/releases)
- [Changelog](https://github.com/gruntjs/grunt-contrib-less/blob/main/CHANGELOG)
- [Commits](https://github.com/gruntjs/grunt-contrib-less/commits/v3.0.0)

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

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

js/package.json

@@ -23,7 +23,7 @@
     "jshint-stylish": "^2.1.0",
     "grunt-concurrent": "~1.0.0",
     "grunt-contrib-concat": "~0.1.2",
-    "grunt-contrib-less": "~0.6.4",
+    "grunt-contrib-less": "~3.0.0",
     "grunt-contrib-watch": "~0.2.0",
     "grunt-newer": "~1.1.1",
     "grunt-wrap": "~0.2.0"