Bump the development-dependencies group across 1 directory with 4 updates

Bumps the development-dependencies group with 4 updates in the / directory: [@eslint/js](https://github.com/eslint/eslint/tree/HEAD/packages/js), [eslint](https://github.com/eslint/eslint), [rollup](https://github.com/rollup/rollup) and [@webref/css](https://github.com/w3c/webref).


Updates `@eslint/js` from 9.33.0 to 9.34.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/commits/v9.34.0/packages/js)

Updates `eslint` from 9.33.0 to 9.34.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v9.33.0...v9.34.0)

Updates `rollup` from 4.47.1 to 4.48.0
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.47.1...v4.48.0)

Updates `@webref/css` from 6.22.0 to 6.23.7
- [Commits](https://github.com/w3c/webref/compare/@webref/[email protected]...@webref/[email protected])

---
updated-dependencies:
- dependency-name: "@eslint/js"
  dependency-version: 9.34.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: eslint
  dependency-version: 9.34.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: rollup
  dependency-version: 4.48.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: "@webref/css"
  dependency-version: 6.23.7
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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

Author: dependabot[bot]