Bump i18next-browser-languagedetector in /frontend/packages/core

Bumps [i18next-browser-languagedetector](https://github.com/i18next/i18next-browser-languageDetector) from 6.1.8 to 8.1.0.
- [Changelog](https://github.com/i18next/i18next-browser-languageDetector/blob/master/CHANGELOG.md)
- [Commits](i18next/i18next-browser-languageDetector@v6.1.8...v8.1.0)

---
updated-dependencies:
- dependency-name: i18next-browser-languagedetector
  dependency-version: 8.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/packages/core/package.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "i18next": "^21.3.2",
-    "i18next-browser-languagedetector": "^6.0.0",
+    "i18next-browser-languagedetector": "^8.1.0",
     "react-i18next": "^11.0.0"
   }
 }