chore(deps): bump @blockly/dev-tools from 8.0.6 to 8.0.9 (#8562)

Bumps [@blockly/dev-tools](https://github.com/google/blockly-samples/tree/HEAD/plugins/dev-tools) from 8.0.6 to 8.0.9.
- [Release notes](https://github.com/google/blockly-samples/releases)
- [Changelog](https://github.com/google/blockly-samples/blob/master/plugins/dev-tools/CHANGELOG.md)
- [Commits](https://github.com/google/blockly-samples/commits/@blockly/dev-tools@8.0.9/plugins/dev-tools)

---
updated-dependencies:
- dependency-name: "@blockly/dev-tools"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>