Bump rollup in /docs in the npm_and_yarn group across 1 directory

Bumps the npm_and_yarn group with 1 update in the /docs directory: [rollup](https://github.com/rollup/rollup).


Updates `rollup` from 4.21.0 to 4.22.4
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.21.0...v4.22.4)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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