Bump the npm_and_yarn group across 1 directory with 2 updates

Bumps the npm_and_yarn group with 2 updates in the /frontend directory: [next](https://github.com/vercel/next.js) and [rollup](https://github.com/rollup/rollup).


Updates `next` from 15.5.7 to 15.5.12
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.7...v15.5.12)

Updates `rollup` from 4.38.0 to 4.59.0
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.38.0...v4.59.0)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.12
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: rollup
  dependency-version: 4.59.0
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]