chore(deps-dev): bump rtlcss from 4.2.0 to 4.3.0 (#5686)

Bumps [rtlcss](https://github.com/MohammadYounes/rtlcss) from 4.2.0 to 4.3.0.
- [Release notes](https://github.com/MohammadYounes/rtlcss/releases)
- [Changelog](https://github.com/MohammadYounes/rtlcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/MohammadYounes/rtlcss/compare/v4.2.0...v4.3.0)

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

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package.json

@@ -87,7 +87,7 @@
     "prettier-plugin-astro": "^0.14.1",
     "rimraf": "^6.0.1",
     "rollup": "^4.21.0",
-    "rtlcss": "^4.2.0",
+    "rtlcss": "^4.3.0",
     "sass": "^1.77.4",
     "stylelint": "^16.8.2",
     "stylelint-config-twbs-bootstrap": "^14.2.0",