chore(deps): bump next from 15.1.0 to 15.1.2

Bumps [next](https://github.com/vercel/next.js) from 15.1.0 to 15.1.2.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.0...v15.1.2)

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

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

package.json

@@ -40,7 +40,7 @@
     "dotenv-cli": "^7.4.2",
     "lucide-react": "^0.460.0",
     "mathjs": "^13.1.1",
-    "next": "^15.1.0",
+    "next": "^15.1.2",
     "postcode": "^5.1.0",
     "react": "^18",
     "react-dom": "^18",