Plugin marketplace serves v1.0.0 for product-management, but repo is at v1.2.0 (missing new skills)

## Summary

The Claude Code plugin marketplace is serving `product-management@knowledge-work-plugins` at version **1.0.0**, but the GitHub repo has been at **1.2.0** since [this commit on March 13](https://github.com/anthropics/knowledge-work-plugins/commit/7b2ea8ea53095665fc1dae68602bf64a57faffab).

As a result, `claude plugin update product-management@knowledge-work-plugins` reports the plugin is already at the latest version (1.0.0) and does not install the newer skills.

## Missing skills

The following skills exist in the repo under `product-management/skills/` but are not available after installing from the marketplace:

- `product-brainstorming`
- `sprint-planning`

## Steps to reproduce

```bash
claude plugin add product-management@knowledge-work-plugins
claude plugin update product-management@knowledge-work-plugins
# Output: product-management is already at the latest version (1.0.0).
```

The two skills above are not available in the session.

## Expected behavior

The marketplace should serve v1.2.0, and all skills present in the repo should be available after install/update.