build(deps-dev): bump find-unused-sass-variables from 4.0.8 to 5.0.0

Bumps [find-unused-sass-variables](https://github.com/XhmikosR/find-unused-sass-variables) from 4.0.8 to 5.0.0.
- [Release notes](https://github.com/XhmikosR/find-unused-sass-variables/releases)
- [Commits](XhmikosR/find-unused-sass-variables@v4.0.8...v5.0.0)

---
updated-dependencies:
- dependency-name: find-unused-sass-variables
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -74,7 +74,7 @@
     "clipboard": "^2.0.11",
     "cross-env": "^7.0.3",
     "eslint": "^8.39.0",
-    "find-unused-sass-variables": "^4.0.8",
+    "find-unused-sass-variables": "^5.0.0",
     "fuse.js": "^6.6.2",
     "hugo-bin": "^0.102.0",
     "lockfile-lint": "^4.10.1",