Bump the development-dependencies group with 4 updates

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


Updates `knip` from 5.59.1 to 5.60.2
- [Release notes](https://github.com/webpro-nl/knip/releases)
- [Changelog](https://github.com/webpro-nl/knip/blob/main/packages/knip/.release-it.json)
- [Commits](https://github.com/webpro-nl/knip/commits/5.60.2/packages/knip)

Updates `rollup` from 4.41.1 to 4.42.0
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.41.1...v4.42.0)

Updates `typescript-eslint` from 8.33.0 to 8.33.1
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/typescript-eslint/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v8.33.1/packages/typescript-eslint)

Updates `@webref/css` from 6.21.2 to 6.22.0
- [Commits](https://github.com/w3c/webref/compare/@webref/css@6.21.2...@webref/css@6.22.0)

---
updated-dependencies:
- dependency-name: knip
  dependency-version: 5.60.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: rollup
  dependency-version: 4.42.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: typescript-eslint
  dependency-version: 8.33.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
- dependency-name: "@webref/css"
  dependency-version: 6.22.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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

Author: dependabot[bot]