feat(deps): bump i18next from 21.6.15 to 21.6.16

Bumps [i18next](https://github.com/i18next/i18next) from 21.6.15 to 21.6.16.
- [Release notes](https://github.com/i18next/i18next/releases)
- [Changelog](https://github.com/i18next/i18next/blob/master/CHANGELOG.md)
- [Commits](i18next/i18next@v21.6.15...v21.6.16)

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

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

package.json

@@ -17,7 +17,7 @@
     "downloadjs": "^1.4.7",
     "file-select-dialog": "^1.5.4",
     "html2pdf.js": "^0.10.1",
-    "i18next": "^21.6.15",
+    "i18next": "^21.6.16",
     "interweave": "^13.0.0",
     "json-as-xlsx": "^2.4.0",
     "jw-epub-parser": "^1.7.1",