fix(deps): update dependency next-i18next to v15 (#232)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [next-i18next](https://togithub.com/i18next/next-i18next) | [`14.0.3` -> `15.0.0`](https://renovatebot.com/diffs/npm/next-i18next/14.0.3/15.0.0) | [![age](https://developer.mend.io/api/mc/badges/age/npm/next-i18next/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/next-i18next/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/next-i18next/14.0.3/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/next-i18next/14.0.3/15.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>i18next/next-i18next (next-i18next)</summary>

### [`v15.0.0`](https://togithub.com/i18next/next-i18next/blob/HEAD/CHANGELOG.md#1500)

[Compare Source](https://togithub.com/i18next/next-i18next/compare/v14.0.3...v15.0.0)

-   refactor: reuse existing i18next instance [#&#8203;2226](https://togithub.com/i18next/next-i18next/pull/2226)
    \-> If you use client side pages (not lazy loading translations), like described [here](https://togithub.com/i18next/i18next-http-backend/tree/master/example/next#4-setup-your-client-rendered-pagescomponents), make sure you set the `partialBundledLanguages` option to true, like [here](https://togithub.com/i18next/i18next-http-backend/tree/master/example/next#4-setup-your-client-rendered-pagescomponents).

</details>

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PR-URL: #232
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

package.json

@@ -56,7 +56,7 @@
 		"i18next-http-backend": "2.3.1",
 		"nanoid": "5.0.3",
 		"next": "14.0.1",
-		"next-i18next": "14.0.3",
+		"next-i18next": "15.0.0",
 		"next-sitemap": "4.2.3",
 		"nextjs-routes": "2.1.0",
 		"react": "18.2.0",