[dependency]: bump stylelint-scss in /explorer/frontend

Bumps [stylelint-scss](https://github.com/stylelint-scss/stylelint-scss) from 5.0.0 to 5.3.0.
- [Release notes](https://github.com/stylelint-scss/stylelint-scss/releases)
- [Changelog](https://github.com/stylelint-scss/stylelint-scss/blob/master/CHANGELOG.md)
- [Commits](stylelint-scss/stylelint-scss@v5.0.0...v5.3.0)

---
updated-dependencies:
- dependency-name: stylelint-scss
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

explorer/frontend/package.json

@@ -54,7 +54,7 @@
     "stylelint-config-rational-order": "^0.1.2",
     "stylelint-config-standard": "^29.0.0",
     "stylelint-order": "^6.0.3",
-    "stylelint-scss": "^5.0.0",
+    "stylelint-scss": "^5.3.0",
     "url": "^0.11.0"
   },
   "browser": true,