chore(deps): bump next from 12.3.1 to 14.2.15 in /apps/staking

Bumps [next](https://github.com/vercel/next.js) from 12.3.1 to 14.2.15.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v12.3.1...v14.2.15)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
...

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

apps/staking/package.json

@@ -41,7 +41,7 @@
         "jquery": "3.6.0",
         "lodash": "4.17.21",
         "luxon": "2.5.2",
-        "next": "14.2.2",
+        "next": "14.2.15",
         "popper.js": "1.16.1",
         "react-chartjs-2": "4.3.1",
         "react-flow-renderer": "9.6.6",