build(deps-dev): bump @nextcloud/eslint-config

Bumps [@nextcloud/eslint-config](https://github.com/nextcloud-libraries/eslint-config) from 9.0.0-rc.7 to 9.0.0-rc.8.
- [Release notes](https://github.com/nextcloud-libraries/eslint-config/releases)
- [Changelog](https://github.com/nextcloud-libraries/eslint-config/blob/main/CHANGELOG.md)
- [Commits](nextcloud-libraries/eslint-config@v9.0.0-rc.7...v9.0.0-rc.8)

---
updated-dependencies:
- dependency-name: "@nextcloud/eslint-config"
  dependency-version: 9.0.0-rc.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]