Bump i18next from 23.14.0 to 23.15.1 in /webui

Bumps [i18next](https://github.com/i18next/i18next) from 23.14.0 to 23.15.1.
- [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/v23.14.0...v23.15.1)

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

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

webui/package.json

@@ -15,7 +15,7 @@
     "@fontsource/inter": "^5.0.21",
     "@mui/icons-material": "^5.16.7",
     "@mui/material": "^5.16.7",
-    "i18next": "^23.14.0",
+    "i18next": "^23.15.1",
     "i18next-browser-languagedetector": "^8.0.0",
     "i18next-http-backend": "^2.6.1",
     "react": "^18.3.1",