chore(deps): bump @blockly/keyboard-navigation from 0.6.9 to 0.6.12 (#83)

Bumps [@blockly/keyboard-navigation](https://github.com/google/blockly-samples/tree/HEAD/plugins/keyboard-navigation) from 0.6.9 to 0.6.12.
- [Release notes](https://github.com/google/blockly-samples/releases)
- [Changelog](https://github.com/google/blockly-samples/blob/master/plugins/keyboard-navigation/CHANGELOG.md)
- [Commits](https://github.com/google/blockly-samples/commits/@blockly/[email protected]/plugins/keyboard-navigation)

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

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

Author: dependabot[bot]