build(deps): bump next in the npm_and_yarn group across 1 directory

Bumps the npm_and_yarn group with 1 update in the / directory: [next](https://github.com/vercel/next.js).


Updates `next` from 15.5.7 to 15.5.9
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/compare/v15.5.7...v15.5.9)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.9
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

package.json

@@ -26,7 +26,7 @@
     "clsx": "^2.1.1",
     "lodash": "^4.17.21",
     "lucide-react": "^0.474.0",
-    "next": "15.5.7",
+    "next": "15.5.9",
     "next-themes": "^0.4.4",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",