Bump find-unused-sass-variables from 3.0.0 to 3.1.0 (#32682)

Bumps [find-unused-sass-variables](https://github.com/XhmikosR/find-unused-sass-variables) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/XhmikosR/find-unused-sass-variables/releases)
- [Commits](https://github.com/XhmikosR/find-unused-sass-variables/compare/v3.0.0...v3.1.0)

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

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

package.json

@@ -114,7 +114,7 @@
     "eslint-config-xo": "^0.34.0",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-unicorn": "^25.0.1",
-    "find-unused-sass-variables": "^3.0.0",
+    "find-unused-sass-variables": "^3.1.0",
     "glob": "^7.1.6",
     "hammer-simulator": "0.0.1",
     "hugo-bin": "^0.68.0",