Bump the development-dependencies group with 2 updates (#461)

Bumps the development-dependencies group with 2 updates: [find-unused-sass-variables](https://github.com/XhmikosR/find-unused-sass-variables) and [stylelint-config-twbs-bootstrap](https://github.com/twbs/stylelint-config-twbs-bootstrap).


Updates `find-unused-sass-variables` from 5.0.0 to 6.0.0
- [Release notes](https://github.com/XhmikosR/find-unused-sass-variables/releases)
- [Commits](XhmikosR/find-unused-sass-variables@v5.0.0...v6.0.0)

Updates `stylelint-config-twbs-bootstrap` from 14.0.0 to 14.1.0
- [Release notes](https://github.com/twbs/stylelint-config-twbs-bootstrap/releases)
- [Commits](twbs/stylelint-config-twbs-bootstrap@v14.0.0...v14.1.0)

---
updated-dependencies:
- dependency-name: find-unused-sass-variables
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
- dependency-name: stylelint-config-twbs-bootstrap
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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

package.json

@@ -39,7 +39,7 @@
     "clipboard": "^2.0.11",
     "cross-env": "^7.0.3",
     "eslint": "^8.57.0",
-    "find-unused-sass-variables": "^5.0.0",
+    "find-unused-sass-variables": "^6.0.0",
     "hugo-bin": "^0.121.1",
     "linkinator": "^6.0.4",
     "lockfile-lint": "^4.13.2",
@@ -48,7 +48,7 @@
     "postcss": "^8.4.38",
     "postcss-cli": "^11.0.0",
     "stylelint": "^16.3.1",
-    "stylelint-config-twbs-bootstrap": "^14.0.0",
+    "stylelint-config-twbs-bootstrap": "^14.1.0",
     "vanilla-lazyload": "^19.0.5",
     "vnu-jar": "23.4.11"
   }