build(deps): bump i18next from 24.2.0 to 25.5.3 in /frontend

Bumps [i18next](https://github.com/i18next/i18next) from 24.2.0 to 25.5.3.
- [Release notes](https://github.com/i18next/i18next/releases)
- [Changelog](https://github.com/i18next/i18next/blob/master/CHANGELOG.md)
- [Commits](https://github.com/i18next/i18next/compare/v24.2.0...v25.5.3)

---
updated-dependencies:
- dependency-name: i18next
  dependency-version: 25.5.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

frontend/package.json

@@ -23,7 +23,7 @@
     "chart.js": "^4.4.4",
     "clsx": "^2.1.1",
     "copy-to-clipboard": "^3.3.3",
-    "i18next": "^24.2.0",
+    "i18next": "^25.5.3",
     "i18next-browser-languagedetector": "^8.0.2",
     "lodash": "^4.17.21",
     "mermaid": "^11.6.0",