Bump next from 15.4.8 to 16.1.5 (#55)

Bumps [next](https://github.com/vercel/next.js) from 15.4.8 to 16.1.5.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.4.8...v16.1.5)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.1.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -28,7 +28,7 @@
     "github-markdown-css": "^5.8.1",
     "marked": "^16.1.1",
     "monaco-editor": "^0.52.2",
-    "next": "15.4.8",
+    "next": "16.1.5",
     "next-intl": "^4.3.4",
     "nextjs-toploader": "^3.8.16",
     "prismjs": "^1.30.0",