chore(deps): bump the nextjs group across 1 directory with 3 updates

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


Updates `@next/third-parties` from 14.2.15 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/third-parties)

Updates `eslint-config-next` from 14.2.15 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)

Updates `next` from 14.2.15 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@v14.2.15...v15.1.2)

---
updated-dependencies:
- dependency-name: "@next/third-parties"
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs
- dependency-name: eslint-config-next
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs
...

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