build(deps-dev): bump @nextcloud/babel-config in /build/frontend-legacy

Bumps [@nextcloud/babel-config](https://github.com/nextcloud-libraries/babel-config) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/nextcloud-libraries/babel-config/releases)
- [Changelog](https://github.com/nextcloud-libraries/babel-config/blob/main/CHANGELOG.md)
- [Commits](nextcloud-libraries/babel-config@v1.2.0...v1.3.0)

---
updated-dependencies:
- dependency-name: "@nextcloud/babel-config"
  dependency-version: 1.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]