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 15.5.4 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](vercel/next.js@v15.5.4...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] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -21,7 +21,7 @@
     "@types/react-dom": "^18.2.0",
     "dayjs": "^1.11.12",
     "millify": "^6.1.0",
-    "next": "15.5.4",
+    "next": "15.5.9",
     "postcss-import": "^16.1.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",