Bump the nextjs group in /frontend with 3 updates

Bumps the nextjs group in /frontend with 3 updates: [@next/third-parties](https://github.com/vercel/next.js/tree/HEAD/packages/third-parties), [next](https://github.com/vercel/next.js) and [@next/eslint-plugin-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-plugin-next).


Updates `@next/third-parties` from 15.2.0 to 15.2.1
- [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/v15.2.1/packages/third-parties)

Updates `next` from 15.1.7 to 15.2.1
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.7...v15.2.1)

Updates `@next/eslint-plugin-next` from 15.1.7 to 15.2.1
- [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/v15.2.1/packages/eslint-plugin-next)

---
updated-dependencies:
- dependency-name: "@next/third-parties"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: nextjs
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nextjs
- dependency-name: "@next/eslint-plugin-next"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: nextjs
...

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Author: dependabot[bot]