Bump hal-voice Version

After editing files under plugins/hal-voice/, bump the version field in both files using semver:

1. plugins/hal-voice/.claude-plugin/plugin.json
2. .claude-plugin/marketplace.json (the plugins[].version for hal-voice)

• Patch (0.2.0 -> 0.2.1): bug fixes, config changes, style cleanup
• Minor (0.2.0 -> 0.3.0): new features, new hooks, new commands
• Major (0.2.0 -> 1.0.0): breaking changes to hook behavior or config format

Bump once per commit session, not per file edit.