build(deps): bump i18next from 25.1.2 to 25.2.1 in /services/idp

Bumps [i18next](https://github.com/i18next/i18next) from 25.1.2 to 25.2.1.
- [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/v25.1.2...v25.2.1)

---
updated-dependencies:
- dependency-name: i18next
  dependency-version: 25.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

services/idp/package.json

@@ -85,7 +85,7 @@
     "@types/redux-logger": "^3.0.13",
     "axios": "^1.8.2",
     "classnames": "^2.5.1",
-    "i18next": "^25.1.2",
+    "i18next": "^25.2.1",
     "i18next-browser-languagedetector": "^8.1.0",
     "i18next-http-backend": "^3.0.2",
     "i18next-resources-to-backend": "^1.2.1",