Bump @next/eslint-plugin-next from 14.2.13 to 15.0.2 in /example

Bumps [@next/eslint-plugin-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-plugin-next) from 14.2.13 to 15.0.2.
- [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/v15.0.2/packages/eslint-plugin-next)

---
updated-dependencies:
- dependency-name: "@next/eslint-plugin-next"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]