chore(deps): Bump i18next from 21.10.0 to 26.3.0 in /packages/core

Bumps [i18next](https://github.com/i18next/i18next) from 21.10.0 to 26.3.0.
- [Release notes](https://github.com/i18next/i18next/releases)
- [Changelog](https://github.com/i18next/i18next/blob/master/CHANGELOG.md)
- [Commits](i18next/i18next@v21.10.0...v26.3.0)

---
updated-dependencies:
- dependency-name: i18next
  dependency-version: 26.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/core/package.json

@@ -10,7 +10,7 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
-    "i18next": "^21.8.14",
+    "i18next": "^26.3.0",
     "i18next-browser-languagedetector": "^6.1.4",
     "react-i18next": "^11.18.1"
   }