chore(deps-dev): bump the dev-dependencies group with 3 updates

Bumps the dev-dependencies group with 3 updates: [@google/genai](https://github.com/googleapis/js-genai), [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) and [rollup](https://github.com/rollup/rollup).


Updates `@google/genai` from 2.2.0 to 2.3.0
- [Release notes](https://github.com/googleapis/js-genai/releases)
- [Changelog](https://github.com/googleapis/js-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/js-genai@v2.2.0...v2.3.0)

Updates `@types/node` from 25.7.0 to 25.8.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Updates `rollup` from 4.60.3 to 4.60.4
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.60.3...v4.60.4)

---
updated-dependencies:
- dependency-name: "@google/genai"
  dependency-version: 2.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: "@types/node"
  dependency-version: 25.8.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: rollup
  dependency-version: 4.60.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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Author: dependabot[bot]