Bump gulp-sass from 5.1.0 to 6.0.0 in /{{cookiecutter.project_slug}}

Bumps [gulp-sass](https://github.com/dlmanning/gulp-sass) from 5.1.0 to 6.0.0.
- [Release notes](https://github.com/dlmanning/gulp-sass/releases)
- [Changelog](https://github.com/dlmanning/gulp-sass/blob/master/CHANGELOG.md)
- [Commits](dlmanning/gulp-sass@v5.1.0...v6.0.0)

---
updated-dependencies:
- dependency-name: gulp-sass
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

{{cookiecutter.project_slug}}/package.json

@@ -18,7 +18,7 @@
     "gulp-plumber": "^1.2.1",
     "gulp-postcss": "^10.0.0",
     "gulp-rename": "^2.0.0",
-    "gulp-sass": "^5.0.0",
+    "gulp-sass": "^6.0.0",
     "gulp-uglify-es": "^3.0.0",
     "mini-css-extract-plugin": "^2.4.5",
     "node-sass-tilde-importer": "^1.0.2",