Bump i18next-http-backend from 3.0.6 to 4.0.0 in /docs/landing-page

Bumps [i18next-http-backend](https://github.com/i18next/i18next-http-backend) from 3.0.6 to 4.0.0.
- [Changelog](https://github.com/i18next/i18next-http-backend/blob/master/CHANGELOG.md)
- [Commits](i18next/i18next-http-backend@v3.0.6...v4.0.0)

---
updated-dependencies:
- dependency-name: i18next-http-backend
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

docs/landing-page/package-lock.json

@@ -25,7 +25,7 @@
     "clsx": "^2.1.1",
     "i18next": "^26.0.9",
     "i18next-browser-languagedetector": "^8.2.1",
-    "i18next-http-backend": "^3.0.6",
+    "i18next-http-backend": "^4.0.0",
     "lucide-react": "^1.14.0",
     "react": "^19.2.6",
     "react-dom": "^19.2.6",