Bump i18next from 21.10.0 to 23.16.8 in /client

Bumps [i18next](https://github.com/i18next/i18next) from 21.10.0 to 23.16.8.
- [Release notes](https://github.com/i18next/i18next/releases)
- [Changelog](https://github.com/i18next/i18next/blob/master/CHANGELOG.md)
- [Commits](i18next/i18next@v21.10.0...v23.16.8)

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

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

client/package.json

@@ -31,7 +31,7 @@
     "@types/pubsub-js": "^1.8.6",
     "classnames": "^2.3.2",
     "filesize": "^10.1.0",
-    "i18next": "^21.10.0",
+    "i18next": "^23.16.8",
     "lodash-es": "^4.17.21",
     "object.fromentries": "^2.0.7",
     "prosemirror-commands": "^1.5.2",