chore: Bump gulp-sass from 5.1.0 to 6.0.0 (#900)

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](https://github.com/dlmanning/gulp-sass/compare/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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

yarn.lock

@@ -3625,10 +3625,10 @@ gulp-run@^1.7.1:
     lodash.template "^4.0.2"
     vinyl "^0.4.6"
 
-gulp-sass@^5.1.0:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/gulp-sass/-/gulp-sass-5.1.0.tgz#bb3d9094f39a260f62a8d0a6797b95ab826f9663"
-  integrity sha512-7VT0uaF+VZCmkNBglfe1b34bxn/AfcssquLKVDYnCDJ3xNBaW7cUuI3p3BQmoKcoKFrs9jdzUxyb+u+NGfL4OQ==
+gulp-sass@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/gulp-sass/-/gulp-sass-6.0.0.tgz#91e651d86baf53bf7de8a537b1a38ea839968a4b"
+  integrity sha512-FGb4Uab4jnH2GnSfBGd6uW3+imvNodAGfsjGcUhEtpNYPVx+TK2tp5uh7MO0sSR7aIf1Sm544werc+zV7ejHHw==
   dependencies:
     lodash.clonedeep "^4.5.0"
     picocolors "^1.0.0"