build(deps): bump slack-block-builder from 2.7.2 to 2.8.0

Bumps [slack-block-builder](https://github.com/raycharius/slack-block-builder) from 2.7.2 to 2.8.0.
- [Release notes](https://github.com/raycharius/slack-block-builder/releases)
- [Changelog](https://github.com/raycharius/slack-block-builder/blob/main/CHANGELOG.md)
- [Commits](raycharius/slack-block-builder@v2.7.2...v2.8.0)

---
updated-dependencies:
- dependency-name: slack-block-builder
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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