Bump qs and grunt-gh-pages

Bumps [qs](https://github.com/ljharb/qs) to 6.5.3 and updates ancestor dependency [grunt-gh-pages](https://github.com/tschaub/grunt-gh-pages). These dependencies need to be updated together.


Updates `qs` from 6.5.2 to 6.5.3
- [Release notes](https://github.com/ljharb/qs/releases)
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.5.2...v6.5.3)

Updates `grunt-gh-pages` from 3.1.0 to 4.0.0
- [Release notes](https://github.com/tschaub/grunt-gh-pages/releases)
- [Changelog](https://github.com/tschaub/grunt-gh-pages/blob/master/changelog.md)
- [Commits](tschaub/grunt-gh-pages@v3.1.0...v4.0.0)

---
updated-dependencies:
- dependency-name: qs
  dependency-type: indirect
- dependency-name: grunt-gh-pages
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "grunt-contrib-qunit": "^2.0.0",
     "grunt-contrib-uglify": "^3.3.0",
     "grunt-contrib-watch": "^1.0.0",
-    "grunt-gh-pages": "^3.1.0",
+    "grunt-gh-pages": "^4.0.0",
     "grunt-retire": "^1.0.7",
     "grunt-sass": "^2.0.0",
     "grunt-zip": "~0.17.1",