chore(deps): bump react-i18next (#58)

Bumps the prod-minor-versions group in /frontend with 1 update: [react-i18next](https://github.com/i18next/react-i18next).


Updates `react-i18next` from 15.2.0 to 15.4.0
- [Changelog](https://github.com/i18next/react-i18next/blob/master/CHANGELOG.md)
- [Commits](i18next/react-i18next@v15.2.0...v15.4.0)

---
updated-dependencies:
- dependency-name: react-i18next
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: prod-minor-versions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -48,7 +48,7 @@
     "oauth4webapi": "^3.1.4",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "react-i18next": "^15.2.0",
+    "react-i18next": "^15.4.0",
     "react-router": "^7.1.1",
     "source-map-support": "^0.5.21",
     "tailwind-merge": "^2.6.0",