build(deps): bump next from 15.5.2 to 15.5.4

Bumps [next](https://github.com/vercel/next.js) from 15.5.2 to 15.5.4.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.2...v15.5.4)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -20,7 +20,7 @@
     "fumadocs-ui": "^15.7.7",
     "lucide-react": "^0.544.0",
     "mdx": "^0.3.1",
-    "next": "^15.5.2",
+    "next": "^15.5.4",
     "node-fetch": "^3.3.2",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",