build(deps): bump i18next in /frontend in the i18next group

Bumps the i18next group in /frontend with 1 update: [i18next](https://github.com/i18next/i18next).


Updates `i18next` from 25.5.2 to 25.5.3
- [Release notes](https://github.com/i18next/i18next/releases)
- [Changelog](https://github.com/i18next/i18next/blob/master/CHANGELOG.md)
- [Commits](i18next/i18next@v25.5.2...v25.5.3)

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

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -30,7 +30,7 @@
     "@zxcvbn-ts/language-common": "^3.0.4",
     "classnames": "^2.5.1",
     "date-fns": "^4.1.0",
-    "i18next": "^25.5.2",
+    "i18next": "^25.5.3",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
     "react-i18next": "^16.0.0",