Bump i18next from 23.14.0 to 23.15.0 in /frontend (#901)

Bumps [i18next](https://github.com/i18next/i18next) from 23.14.0 to
23.15.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/i18next/i18next/releases">i18next's
releases</a>.</em></p>
<blockquote>
<h2>v23.15.0</h2>
<ul>
<li>support unescaped variables in TypeScript <a
href="https://redirect.github.com/i18next/i18next/pull/2233">2233</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/i18next/i18next/blob/master/CHANGELOG.md">i18next's
changelog</a>.</em></p>
<blockquote>
<h2>23.15.0</h2>
<ul>
<li>support unescaped variables in TypeScript <a
href="https://redirect.github.com/i18next/i18next/pull/2233">2233</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/i18next/i18next/commit/e5170ad9d024c4279e8682a21f741491316ccd9e"><code>e5170ad</code></a>
23.15.0</li>
<li><a
href="https://github.com/i18next/i18next/commit/3256771b1e1ae1ab5da587540630e4a7a7cf3503"><code>3256771</code></a>
release</li>
<li><a
href="https://github.com/i18next/i18next/commit/f0768a1d961b9488d3add69146a2b6caecbebb51"><code>f0768a1</code></a>
support unescaped variables in TypeScript (<a
href="https://redirect.github.com/i18next/i18next/issues/2233">#2233</a>)</li>
<li>See full diff in <a
href="https://github.com/i18next/i18next/compare/v23.14.0...v23.15.0">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=i18next&package-manager=npm_and_yarn&previous-version=23.14.0&new-version=23.15.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -37,7 +37,7 @@
     "cookies-next": "^4.2.0",
     "date-fns": "^3.6.0",
     "dayjs": "^1.11.10",
-    "i18next": "^23.14.0",
+    "i18next": "^23.15.0",
     "next": "^14.2.2",
     "next-i18next": "^15.3.0",
     "react": "^18.3.0",