Bump the next group in /app/frontend with 2 updates

Bumps the next group in /app/frontend with 2 updates: [next](https://github.com/vercel/next.js) and [eslint-config-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-config-next).


Updates `next` 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)

Updates `eslint-config-next` 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](https://github.com/vercel/next.js/commits/v15.1.2/packages/eslint-config-next)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: next
- dependency-name: eslint-config-next
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: next
...

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

app/frontend/package.json

@@ -19,7 +19,7 @@
     "ace-builds": "^1.36.5",
     "axios": "^1.7.7",
     "bootstrap": "^5.3.3",
-    "next": "^15.1.0",
+    "next": "^15.1.2",
     "prop-types": "^15.7.2",
     "react": "^18.3.1",
     "react-ace": "^13.0.0",
@@ -35,7 +35,7 @@
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
     "eslint": "^9.17.0",
-    "eslint-config-next": "^15.1.0",
+    "eslint-config-next": "^15.1.2",
     "jest": "^29.6.4",
     "jest-environment-jsdom": "^29.7.0",
     "prettier": "^3.4.2",