Bump next from 14.2.15 to 15.5.2

Bumps [next](https://github.com/vercel/next.js) from 14.2.15 to 15.5.2.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.15...v15.5.2)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -69,7 +69,7 @@
     "jsonwebtoken": "^9.0.2",
     "jspdf": "^2.5.2",
     "lucide-react": "^0.541.0",
-    "next": "14.2.15",
+    "next": "15.5.3",
     "next-intl": "^4.3.4",
     "next-mdx-remote": "^5.0.0",
     "polkadot-api": "^1.15.0",